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Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Proxy Error - Fix Docker Pull Access Denied for Private Repositories-How to Fix Chrome Update Error 12 (No Reset Needed)

Updated 2026-06-13 12:41:28macos-help
Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Proxy Error - Fix Docker Pull Access Denied for Private Repositories-How to Fix Chrome Update Error 12 (No Reset Needed)
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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