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Fix Chrome Profile 404 Error: Missing User Data - Fix Chrome Not Staying Logged In-Resolve Chrome Profile Port Conflict on macOS

Updated 2026-06-14 03:10:25developer-tools
Fix Chrome Profile 404 Error: Missing User Data - Fix Chrome Not Staying Logged In-Resolve Chrome Profile Port Conflict on macOS
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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