I resolved the issue by referring to another article which discussed an entirely different issue but described how to clear MS Teams cache. Here are the steps.
- Quit Microsoft Teams (ctrl-Q)
- Go to the command line and run the following: rm -rf ~/Library/Caches/com.microsoft.teams
rm -rf ~/Library/Application\ Support/Microsoft/Teams/Application\ Cache/Cache
rm -rf ~/Library/Application\ Support/Microsoft/Teams/blob_storage
rm -rf ~/Library/Application\ Support/Microsoft/Teams/Cache
rm -rf ~/Library/Application\ Support/Microsoft/Teams/databases
rm -rf ~/Library/Application\ Support/Microsoft/Teams/GPUCache
rm -rf ~/Library/Application\ Support/Microsoft/Teams/IndexedDB
rm -rf ~/Library/Application\ Support/Microsoft/Teams/Local\ Storage
rm -rf ~/Library/Application\ Support/Microsoft/Teams/tmp
- Launch Teams