Fix Microsoft Teams 502 Bad Gateway Error When Joining a Meeting - Fix Error 0x80073b01 in Windows Security-How to Resolve Windows Security Proxy Error from Antivirus
Before changing system settings, save your work and note the exact error text so you can compare results after each step.
Extra verification checklist
- Restart the affected app after changing permissions or configuration files.
- Test the same workflow in a clean browser profile or a temporary user account.
- Compare the result on another network if the error may be connection related.
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