@Mai, Aiden ,
Do you download Microsoft Teams from this link?
Someone shares the causes and solution for this issue.
The causes are as below:
Your program or its settings may have gone corrupt
The Quality Windows Audio Video Experience service is not running
Your app runs with administrator permissions
You don’t have the right version of Microsoft Visual C++ Redistributable
About how to fix this issue, please refer to the steps in this article.
Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.