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Fix Microsoft Teams 404 Not Found Server Issue - Chrome Profile Won't Open: How to Fix It-Fix PowerShell 504 Gateway Timeout in IIS Configuration

Updated 2026-06-14 00:29:47office-tools
Fix Microsoft Teams 404 Not Found Server Issue - Chrome Profile Won't Open: How to Fix It-Fix PowerShell 504 Gateway Timeout in IIS Configuration
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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