Sometimes clearing the cache in Teams can resolve presentation errors for the ConnecttoTeams app. The instructions for doing so on various platforms are as follows.
Web
Right click - select “Inspect’ or “Inspect Element” depending on browser.
In chrome - on the reload button - right click and select “Empty Cache and Hard Reload.”
Other browsers - clear history including cookies and data.
Log out of Teams.
Log back into Teams.
Sync the Teams app.
Mobile
Pulling down on the chat should refresh the page. If not, logout from the app and log back in.
PC
Quit Microsoft Teams. Right-click the icon and select Quit.
Copy and paste %appdata%\Microsoft\Teams into File Explorer.
Delete the contents of the entire folder.
Restart Microsoft Teams.
Mac
Sign out of Microsoft Teams.
In the Finder on the Mac, choose Go > Go To Folder. Enter the path to the following folders and delete the files they contain:
~/Library/Application Support/Microsoft/Teams/Application Cache/Cache
~/Library/Application Support/Microsoft/Teams/blob_storage
~/Library/Application Support/Microsoft/Teams/Cache
~/Library/Application Support/Microsoft/Teams/databases
~/Library/Application Support/Microsoft/Teams/GPUCache
~/Library/Application Support/Microsoft/Teams/IndexedDB
~/Library/Application Support/Microsoft/Teams/Local Storage
~/Library/Application Support/Microsoft/Teams/tmp
For the new Teams
Follow the steps documented in this Microsoft article
https://learn.microsoft.com/en-us/microsoftteams/troubleshoot/teams-administration/clear-teams-cache