Description of problem:

If the user tries to import a valid YAML file that doesn't match the questionnaire format, the UI doesn't display any error on the screen.

An error is, however, visible in the browser console.

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

How reproducible: Always 

Steps to Reproduce:
1. Go to Administration->Questionnaires
2. Click on "Import questionnaire"
3. Select a YAML file that has nothing to do with the required format (You can find an example file attached)

Actual results:

No message is displayed in the UI and an "Invalid JSON data" error is fired in the browser console

Expected results:

If a YAML file is not valid, an error should be displayed in the UI.

Additional info:

Video and example file attached.

Video with console output: https://jam.dev/c/3e4fbb50-3850-4d45-ab52-877ba1b4b7df