App crashed after initiating a search in "Manage Resources" section and "Learn" page

[MindfulQA]

Observed behavior

While attempting to perform a search in the "Manage Resources" section, the app crashed.

…

Expected behavior

The user should receive the relevant search results.
…

User-facing consequences

The user is unable to view search results and has to restart the app.
…

Errors and logs

INFO 2020-10-28 00:00:00,779 cherrypy.access 127.0.0.1 - - "GET /coach/api/classsummary/1312c0db219c5c01e74ee0bbe62de63f/" 200 0 "http://localhost:5000/en/coach/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)"
INFO 2020-10-28 00:00:01,992 cherrypy.access 127.0.0.1 - - "GET /coach/api/notifications/" 200 0 "http://localhost:5000/en/coach/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)"
INFO 2020-10-28 00:00:02,536 cherrypy.access 127.0.0.1 - - "GET /coach/api/classsummary/1312c0db219c5c01e74ee0bbe62de63f/" 200 0 "http://localhost:5000/en/coach/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)"
INFO 2020-10-28 00:00:04,067 cherrypy.access 127.0.0.1 - - "GET /coach/api/notifications/" 200 0 "http://localhost:5000/en/coach/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)"
INFO 2020-10-28 00:00:04,842 cherrypy.access 127.0.0.1 - - "GET /coach/api/classsummary/1312c0db219c5c01e74ee0bbe62de63f/" 200 0 "http://localhost:5000/en/coach/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)"
INFO 2020-10-28 00:00:04,893 cherrypy.access 127.0.0.1 - - "GET /api/lessons/lesson/be7a201bc187abc8296e658d8c910325/" 200 0 "http://localhost:5000/en/coach/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)"
INFO 2020-10-28 00:00:04,916 cherrypy.access 127.0.0.1 - - "GET /api/content/contentnode/descendants/" 200 0 "http://localhost:5000/en/coach/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)"
INFO 2020-10-28 00:00:05,940 cherrypy.access 127.0.0.1 - - "GET /coach/api/classsummary/1312c0db219c5c01e74ee0bbe62de63f/" 200 0 "http://localhost:5000/en/coach/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)"
INFO 2020-10-28 00:00:06,127 cherrypy.access 127.0.0.1 - - "GET /coach/api/notifications/" 200 0 "http://localhost:5000/en/coach/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)"

…

Steps to reproduce

Note - this is not 100% reproducible, but these were the steps taken:

1. Open Kolibiri desktop app and log in to Coach account
2. From the class home page, click on an existing lesson (or create a new one if there is not one already existing)
3. The lesson should open under the "Reports" tab. From the lesson title box, click the "options" drop-down menu and click "manage resources."
4. Enter a search term in the search bar and click the magnifying glass
5. Observe that the app crashes

…

Context

macOS Catalina 12.15.7 - Kolibri version 0.14
…

[jonboiser]

I was able to reproduce this. It also happens if you search for resources when you enter the Manage Resources workflow from the Plan > Lessons page and when searching for resources on the Learn page. By "crash" it means the app quits running and you get a MacOS crash report modal (so it's not like a JS runtime error)

@MindfulQA, this seems to be a way I can reliably reproduce this: Whenever you do a search, keypress "Enter" on the keyboard instead of clicking the search button with the mouse. The app always crashes for me that way.

If you do a first search by clicking the button with a mouse, the search succeeds with no crash. After that initial success, other searches work for me using keyboard or not.