Help me figure out why this OpenAPI Mock Server returns 500 for some requests?

I’ve tried to spin up a mock API with OpenAPI spec. I’m struggling to debug why some requests return 500 rather than 200? Is this intended or am I missing something?

I have attached the openAPI file. Would really appreciate the help.

openapi: "3.0.0"
info:
  version: 1.0.0
  title: Example Mock
  license:
    name: MIT
servers:
  - url: http://example.com
paths:
  /auth/login:
    post:
      summary: Login and get a bearer token
      description: |
        In order to make a request you must first use the login endpoint to authorise requests. A bearertoken can
        then be used to authorise any search requests made.
      operationId: authLogin
      tags:
        - login
      requestBody:
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/LoginRequest"
      responses:
        '200':
          description: Dummy response
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/LoginResponse"
        '500':
          description: unexpected error
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Error"

  /search/Address:
    post:
      summary: Address searching
      operationId: searchAddress
      tags:
        - search
      requestBody:
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/addressSearchRequest"
      responses:
        '200':
          description: Expected response to a valid request
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/addressSearchResponse"
        '500':
          description: unexpected error
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Error"

  /search/DateOfBirth:
    post:
      summary: Date of birth verification
      operationId: searchDateOfBirth
      tags:
        - search
      requestBody:
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/dobSearchRequest"
      responses:
        '200':
          description: Expected response to a valid request
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/dobSearchResponse"
        '500':
          description: unexpected error
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Error"

  /search/Sanction:
    post:
      summary: Sanction / PEP check
      operationId: searchSanction
      tags:
        - search
      requestBody:
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/sanctionSearchRequest"
      responses:
        '200':
          description: Expected response to a valid request
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/sanctionSearchResponse"
        '500':
          description: unexpected error
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Error"

  /search/Insolvency:
    post:
      summary: Insolvency check
      operationId: searchInsolvency
      tags:
        - search
      requestBody:
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/insolvencySearchRequest"
      responses:
        '200':
          description: Expected response to a valid request
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/insolvencySearchResponse"
        '500':
          description: unexpected error
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Error"


  /search/DeathScreen:
    post:
      summary: Death search
      operationId: searchDeathScreen
      tags:
        - search
      requestBody:
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/deathscreenSearchRequest"
      responses:
        '200':
          description: Expected response to a valid request
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/deathscreenSearchResponse"
        '500':
          description: unexpected error
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Error"

  /search/CCJ:
    post:
      summary: CCJ check
      operationId: searchCCJ
      tags:
        - search
      requestBody:
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/ccjSearchRequest"
      responses:
        '200':
          description: Expected response to a valid request
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/ccjSearchResponse"
        '500':
          description: unexpected error
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Error"

  /search/CreditActive:
    post:
      summary: Credit information search
      operationId: searchCreditActive
      tags:
        - search
      requestBody:
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/creditactiveSearchRequest"
      responses:
        '200':
          description: Expected response to a valid request
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/creditactiveSearchResponse"
        '500':
          description: unexpected error
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Error"

components:
  schemas:
    Error:
      type: object
      required:
        - code
        - message
      properties:
        code:
          type: integer
          format: int32
        message:
          type: string

    LoginSuccess:
      type: object
      required:
        - bearertoken
      example: "dsad3432098df90sadsalknd=="

    Address:
      type: object
      required:
        - addressline1
        - countrycode
      example:
        addressline1: "200"
        addressline2: "Julius Road"
        addressline3: "Bishopston"
        addressline4: "South West"
        addressline5: "Bristol"
        postalcode: "BS7 8EU"
        countrycode: "GB"
      properties:
        addressline1:
          type: string
          maxLength: 20
        addressline2:
          type: string
          maxLength: 20
        addressline3:
          type: string
          maxLength: 20
        addressline4:
          type: string
          maxLength: 20
        addressline5:
          type: string
          maxLength: 20
        postalcode:
          type: string
          maxLength: 9
          pattern: '^([Gg][Ii][Rr] 0[Aa]{2})|((([A-Za-z][0-9]{1,2})|(([A-Za-z][A-Ha-hJ-Yj-y][0-9]{1,2})|(([A-Za-z][0-9][A-Za-z])|([A-Za-z][A-Ha-hJ-Yj-y][0-9][A-Za-z]?))))\s?[0-9][A-Za-z]{2})$'
        countrycode:
          type: string
          maxLength: 3
          example: GB
        dates:
          type: array
          items:
            type: object
            properties:
              key:
                type: string
              value:
                type: string
            example: 
              key: "PeriodStart"
              value: "2001-12-06"

    addresses:
      type: array
      description: "Addresses found for subject"
      items:
        $ref: '#/components/schemas/Address'
    Dob:
      type: string
      format: date
      example: "1950-20-11"

    property:
      type: object
      properties:
        propertysale:
          type: object
          example:
            date: "1975-01-01"
            price: "£150,000"
            silhouette: "D12"
            type: ""
            tenure: ""
          properties:
            date:
              type: string
            price:
              type: string
            silhouette:
              type: string
            type:
              type: string
            tenure:
              type: string

    insolvAddress:
      type: object
      example: 
        address1: "100"
        address2: "JULIUS ROAD"
        address3: "BRISTOL"
        address4: ""
        address5: ""
        dps: ""
        postcode: "B27 6BU"
      properties:
        address1:
          type: string
        address2:
          type: string
        address3:
          type: string
        address4:
          type: string
        address5:
          type: string
        dps:
          type: string
        postcode:
          type: string

# Requests and responses
    LoginRequest:
      type: object
      required:
        - user
        - password
      example:
        user: "testUser"
        password: "testPassword"
      properties:
        user:
          type: string
        password:
          type: string

    LoginResponse:
      type: object
      example:
        logintransactionid: "7basdhjdhsa82348"
        bearertoken: "40DSAKjdsajh0934=="
        expiryTime: 16594
      properties:
        logintransactionid:
          type: string
        bearertoken:
          type: string
        expiryTime:
          type: integer
          format: int32

    addressSearchRequest:
      type: object
      required:
        - firstname
        - lastname
        - dob
        - addresses
      example:
        firstname: "JOHN"
        lastname: "SMITH"
        dob: "1990-11-01"
      properties:
        firstname:
          type: string
        lastname:
          type: string
        dob:
          type: string
          format: date
        addresses:
          $ref: "#/components/schemas/addresses"

    addressSearchResponse:
      type: object
      example:
        forenameappended: false
        middlename: "Morgan"
        telephone: "0123456789"
        source: ""
        recency: ""
        forename: "John"
        middlenameappended: false
        phonematch: ""
        goneaway: "N"
        uklexid: 81293
        surname: "SMITH"
        matchtype: ""
        addressvalidated: true
        dobappended: false
        occupants: ""

      properties:
        forenameappended:
          type: boolean
        middlename:
          type: string
        telephone:
          type: string
        source:
          type: string
        recency:
          type: string
        forename:
          type: string
        middlenameappended:
          type: boolean
        phonematch:
          type: string
        goneaway:
          type: string
        uklexid:
          type: integer
          format: int32
        surname:
          type: string
        dob:
          $ref: "#/components/schemas/Dob"
        matchtype:
          type: string
        property:
          $ref: "#/components/schemas/property"
        addressvalidated:
          type: boolean
        dobappended:
          type: boolean
        occupants:
          type: string

    sanctionSearchRequest:
      type: object
      required:
        - firstname
        - lastname
        - addresses
      example:
        firstname: "JOHN"
        lastname: "SMITH"
      properties:
        firstname:
          type: string
        lastname:
          type: string
        addresses:
          $ref: "#/components/schemas/addresses"

    sanctionSearchResponse:
      type: object
      properties:
        match:
          type: array
          items:
            type: object
            example:
              country: "United Kingdom"
              matchscore: 100
              aliases: "Jonathan Smith"
              dob: "1950-03-11"
              name: "John Smith"
              positions: "CEO"
              source: "National:PEP:Family Member"
              type: "PEP"
              recency: ""
              exceptions: ""
            properties:
              country:
                type: string
                description: "Country of the sanction location"
              addresses:
                $ref: "#/components/schemas/addresses"
              matchscore:
                type: integer
                format: int32
                description: "Indicates how closely the record matched the input information (maximum score of 100)."
                maximum: 100
              aliases:
                type: string
                description: "Possible other names subject is known by"
              dob:
                type: object
                properties:
                  dob:
                    type: string
                    description: "Date of birth for this data source"
                    format: date
              name:
                type: string
                description: "Name of subject from search result"
              positions:
                type: object
                description: "Contains positions of subject in reference to political afiliations or businesses"
                properties:
                  positions:
                    type: string
                    description: "Positions held for subject"
              source:
                type: string
                description: "Source of data for match"
              type:
                type: string
                description: "Kind of sanction. May contain how widely known subject is e.g. National"
              recency:
                type: string
                description: "Recency of the data source providing sanction match"
                format: date
              exceptions:
                type: string
                description: "Exceptions from the request"

    ccjSearchRequest:
      type: object
      required:
        - firstname
        - lastname
        - dob
        - addresses
      example:
        firstname: "JOHN"
        lastname: "SMITH"
        dob: "1990-11-01"
      properties:
        firstname:
          type: string
        lastname:
          type: string
        dob:
          type: string
          format: date
        addresses:
          $ref: "#/components/schemas/addresses"

    ccjSearchResponse:
      type: object
      example:
        amount: "£600.00"
        address1: "200"
        address2: "JULIIUS ROAD"
        address3: "BRISTOL"
        address4: ""
        address5: ""
        postcode: "BS7 8EU"
        courtname: "BRISTOL COUNTY COURT"
        dateend: "2021-11-20"
        judgementdate: "2016-11-01"
        casenumber: "CAE341CN"
        uklexid: 321378
        name: "JOHN SMITH"
        judgementtype: "Satisfaction"

      properties:
          amount:
            type: string
          address3:
            type: string
          address2:
            type: string
          address1:
            type: string
          courtname:
            type: string
          postcode:
            type: string
          dateend:
            type: string
            format: date
          judgementdate:
            type: string
            format: date
          casenumber:
            type: string
            example:
          uklexid:
            type: integer
            format: int32
          dob:
            $ref: "#/components/schemas/Dob"
          name:
            type: string
          judgementtype:
            type: string
          address5:
            type: string
          address4:
            type: string

    dobSearchRequest:
      type: object
      required:
        - firstname
        - lastname
        - dob
        - addresses
      example:
        firstname: "JOHN"
        lastname: "SMITH"
        dob: "1990-11-01"
      properties:
        firstname:
          type: string
        lastname:
          type: string
        dob:
          type: string
          format: date
        addresses:
          $ref: "#/components/schemas/addresses"

    dobSearchResponse:
      type: object
      properties:
        experiandob:
          type: integer
        tracesmartdob:
          type: integer
      example:
        experiandob: 0
        tracesmartdob: 1

    creditactiveSearchRequest:
      type: object
      required:
        - firstname
        - lastname
        - addresses
      example:
        firstname: "JOHN"
        lastname: "SMITH"
      properties:
        firstname:
          type: string
        lastname:
          type: string
        addresses:
          $ref: "#/components/schemas/addresses"

    creditactiveSearchResponse:
      type: object
      example:
        insightaccounts: 0
        insightlenders: 0
        caislenders: 0
      properties:
        insightaccounts:
          type: integer
        insightlenders:
          type: integer
        caislenders:
          type: integer

    deathscreenSearchRequest:
      type: object
      description: "Request to send for a check on whether the person has a registered death"
      required:
        - firstname
        - lastname
        - addresses
      example:
        firstname: "JOHN"
        lastname: "SMITH"
      properties:
        firstname:
          type: string
        lastname:
          type: string
        addresses:
          $ref: "#/components/schemas/addresses"

    deathscreenSearchResponse:
      type: object
      properties:
        death:
          type: object
          example:
            distno: ""
            dor: ""
            source: "DEATH REGISTRATION INFORMATION"
            forename: "JOHN"
            secondname: "ROBERT"
            thirdname: ""
            fourthname: ""
            surname: "SMITH"
            entryno: ""
            uklexid: 1234567
            volumeno: ""
            matchtype: "NAME, ADDRESS AND DOB"
            groreference: "TT12356789"
            placeofbirth: "BRISTOL"
            dob: "1930-10-01"
            pageno: ""
            district: ""
            dod: "2000-05-01"
            maidenname: "SMITHSON"
            address1: "200"
            address2: "JULIIUS ROAD"
            address3: "BRISTOL"
            address4: ""
            address5: ""
            postcode: "BS7 8EU"
          properties:
            distno:
              type: string
            dor:
              type: string
            source:
              type: string
              description: "Source of the data from this death"
            forename:
              type: string
              description: "Forename of the deceased"
            entryno:
              type: string
            uklexid:
              type: integer
              format: int32
            thirdname:
              type: string
            surname:
              type: string
              description: "Surname of the deceased"
            volumeno:
              type: string
            matchtype:
              type: string
              description: "Level of the match"
            address5:
              type: string
            fourthname:
              type: string
            address4:
              type: string
            regno:
              type: string
            groreference:
              type: string
            address3:
              type: string
            address2:
              type: string
            address1:
              type: string
            postcode:
              type: string
            placeofbirth:
              type: string
              description: "Place of the deceased birth"
            secondname:
              type: string
            dob:
              type: string
              description: "Subjects date of birth"
              format: date
            pageno:
              type: string
            district:
              type: string
            dod:
              type: string
              description: "Date of the death"
              format: date
            maidenname:
              type: string

    insolvencySearchRequest:
      type: object
      required:
        - firstname
        - lastname
        - addresses
      example:
        firstname: "JOHN"
        lastname: "SMITH"
      properties:
        firstname:
          type: string
          example: "JOHN"
        lastname:
          type: string
          example: "SMITH"
        addresses:
          $ref: "#/components/schemas/addresses"

    insolvencySearchResponse:
      type: object
      example:
        occupation: "CONSTRUCTION"
        aliases: "JONATHAN"
        assettotal: ""
        telephonenumber: "0123456789"
        serviceoffice: "BRISTOL"
        description: "JOHN SMITH TRADING AS SMITH CONSTRUCTION"
        tradingnames: ""
        court: "BRISTOL COUNTY COURT"
        startdate: "2015-01-01"
        type: "I"
        debttotal: ""
        caseno: 44022
        uklexid: 1235672
        name: "MR JOHN ROBERT SMITH"
        presentationdate: "2015-01-02"
        casetype: ""
        status: "CURRENT"
      properties:
        address:
          $ref:  "#/components/schemas/insolvAddress"
        occupation:
          type: string
        aliases:
          type: string
        assettotal:
          type: string
        telephonenumber:
          type: string
        serviceoffice:
          type: string
        description:
          type: string
        tradingnames:
          type: string
        court:
          type: string
        startdate:
          type: string
          format: date
        type:
          type: string
        debttotal:
          type: string
        caseno:
          type: integer
          format: int32
        uklexid:
          type: integer
          format: int32
        dob:
          $ref: "#/components/schemas/Dob"
        name:
          type: string
        presentationdate:
          type: string
          format: date
        casetype:
          type: string
        previousaddress:
          $ref: "#/components/schemas/insolvAddress"
        status:
          type: string

Thanks

Where is the mock server running?