Steps:
Check for Updates:
Open Teams and click on your profile picture in the top right corner.
Select Check for updates and install any available updates.
Clear Teams Cache:
Close Microsoft Teams.
Navigate to C:\Users\<YourUsername>\AppData\Roaming\Microsoft\Teams.
Delete all the files in this folder (don't delete the folder itself).
Reopen Teams and see if the issue persists.
Reinstall Teams:
Uninstall Teams from Settings > Apps.
Download the latest version from the Microsoft Teams website.
Reinstall and check if it opens correctly.
Check System Requirements:
Make sure the system meets the necessary specifications for Teams, including RAM, processor, and operating system.