Ms teams turn in assignment- add work not working

I am having a problem uploading files in teams, i.e I can't add work in the "work section" in assignment in my pixel 4a. when I click on add work it takes me to the files and I select the file, but it doesn't get uploaded. I have tried In my samsung device it works just fine but in my pixel 4a it's not working. Android version 11 device pixel 4a issue:- add work not working.