submission_form_fields api throwing 500 error & submission_table returning empty list

[NSUWAL123]

Describe the bug
The /submission/submission_form_fields/49 is throwing 500 response.
Also, submission/submission_table/49?page=1 is returning an empty list although submissions is done.

To Reproduce
Steps to reproduce the behavior:

1. Open the network tab
2. Go to project-submissions page
3. Click /submission/submission_form_fields/49 to view the error
4. Click submission/submission_table/49?page=1 to see the empty list if submissions are made prior

Expected behavior

1. The /submission/submission_form_fields/49 should throw 500 error
2. The submission/submission_table/49?page=1 should return submissions if submissions are made via ODK

Screenshots