Description of problem:

In the questionnaires menu, when importing a YAML file that lacks specific values, the menu breaks and the user loses access to it. 

Version-Release number of selected component (if applicable): 7.0.0

How reproducible: Always

Steps to Reproduce:
1. Go to Administration -> Assessment questionnaires
2. Click on "Import questionnaire" and upload a YAML file that doesn't have answers on one of their questions. (There is an example file attached)

Actual results: The menu becomes unavailable 

Expected results: MTA shouldn't accept yaml files with invalid values. 

Additional info:

Video and example file attached.

Video with console output: https://jam.dev/c/2fe247c8-ef34-447e-bf96-967873211a66