# Unable to figure out what was the exact issue?

**URL:** <https://community.postman.com/t/unable-to-figure-out-what-was-the-exact-issue/27485>\
**Category:** Help Hub\
**Tags:** tests, collections\
**Created:** [September 4, 2021, 10:33am UTC](https://community.postman.com/t/unable-to-figure-out-what-was-the-exact-issue/27485 "2021-09-04T10:33:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![cryosat-technologis2](https://avatars.discourse-cdn.com/v4/letter/c/258eb7/32.png) [@cryosat-technologis2](https://community.postman.com/u/cryosat-technologis2)\
**Post date:** [September 4, 2021, 10:33am UTC](https://community.postman.com/t/unable-to-figure-out-what-was-the-exact-issue/27485/1 "2021-09-04T10:33:14Z")

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> Here’s an outline with best practices for making your inquiry.

_My question_:  
Though I have did as instructed in the collection of Postman student expert training program. I am getting 2 errors while testing them in skill check. Not sure of what they exactly mean?

_Details (like screenshots)_:

 ![image](https://us1.discourse-cdn.com/getpostman/original/2X/5/521f165c6d11c4ae24582c57f6b1921175c484ad.png)  
 ![postman 01](https://us1.discourse-cdn.com/getpostman/original/2X/e/e0845388ef3f0a1abe6570a645259d420684bdf4.jpeg)  
 ![postman 02](https://us1.discourse-cdn.com/getpostman/original/2X/7/703f619cdcdd914400e2fc6c7ebe84035fe59718.jpeg)

_How I found the problem_:  
Though the Skill checker is complete but still getting the error

- List item  
Used variables | TypeError: Cannot read property ‘raw’ of null  
Used query and path parameters | TypeError: Cannot read property ‘query’ of null

_I’ve already tried_:  
I have tried doing it again and saved everything while done with the lesson.

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<div class="post-metadata">

**Author:** ![danny-dainton](https://sea2.discourse-cdn.com/getpostman/user_avatar/community.postman.com/danny-dainton/32/29401_2.png) [@danny-dainton](https://community.postman.com/u/danny-dainton)\
**Post date:** [September 4, 2021, 12:14pm UTC](https://community.postman.com/t/unable-to-figure-out-what-was-the-exact-issue/27485/2 "2021-09-04T12:14:47Z")

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Can you expand the folders so that we can see all the requests please?

I would recommend going through it again and reading all the information in the documentation and the responses.

If you have done it all again and saved it, you would still need to update the collection link, the update option will be in the same place that you generated the public link.