
There are many reasons for this problem, and cleaning your cache and updating Teams are very useful troubleshooting methods. To troubleshoot if it's a desktop client, check if the same issue exists in the Teams web client.
Also, I've noticed a potential issue in the service health of the Microsoft 365 admin center that may be affecting you as well.
Problem description: TM530845, Last updated: April 13, 2023, 3:36 AM
Some users may encounter rendering issues when opening content from the Files tab in Microsoft Teams.
As the current situation stands, the engineering team continues to test and validate patches internally, so please be patient for the next update. Thanks for your understanding and patience!
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