Please complete the following steps to update your TEAMs platform (you may have to do this more than once):
To update "TEAMs":
Left click on your icon in the upper right-hand corner of your screen when you are in TEAMs.
Choose the update option in the dropdown menu.
Let the updates run.
Then, right click on the TEAMs icon you see at the bottom of your screen.
Choose the "quit" option.
Completely shut down your computer.
Restart the computer after one full minute.