Additional meeting and call-related features and issues within Microsoft Teams for business
My Teams worked fine with background choices on my laptop on the morning on 12th May 2020, but by the evening it had stopped working. When choosing Backgrounds the right hand panel has that title but is now completely empty and there are no choices available. I have tried uninstalling and re-installing Teams but it has made no difference. The above hyperlink from @MGREYES took me to Microsoft Office support and they politely told me that they can do nothing about Teams and that I need to contact Professional Support