Help! "error": "invalid_authorization", "error_description": "Unauthorized"

Hello,
I imported a collection of several ServiceNow (OAuth2) methods and endpoints. All are going to the same base URL. Some of the methods are returning,
“error”: “invalid_authorization”,
“error_description”: “Unauthorized”
However, they work from Boomi visualization portal so it really seems like a Postman issue.
Following is an example log:
GET https://boomi.escloud-dev.sas.com/edgemicro_snboomi/CHGMgmt/CHG0179053401

434 ms

GET /edgemicro_snboomi/CHGMgmt/CHG0179053 HTTP/1.1

x-api-key:

iPlanetDirectoryPro:

User-Agent: PostmanRuntime/7.25.0

Accept: /

Cache-Control: no-cache

Postman-Token: d7507f9f-6791-4178-9674-9b8ec2d804be

Host: boomi.escloud-dev.sas.com

Accept-Encoding: gzip, deflate, br

Connection: keep-alive

Cookie: BIGipServer~CLOUDOPS~itcf-red-443-pool=1738631178.47873.0000

HTTP/1.1 401 Unauthorized

Content-Length: 68

Content-Type: application/json

Date: Sun, 07 Jun 2020 12:28:21 GMT

X-Content-Type-Options: nosniff

X-Frame-Options: DENY

X-Ratelimit-Limit: 1000

X-Ratelimit-Remaining: 999

X-Ratelimit-Reset: 59

X-Vcap-Request-Id: 853ab40c-7484-4084-5537-95aec06e2112

X-Xss-Protection: 1; mode=block

{“error”:“invalid_authorization”,“error_description”:“Unauthorized”}