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Fix VS Code Git Authentication Failed Keychain Error - Git Push Rejected: Non Fast-Forward Fix Guide-Missing Taskbar Icons in Windows 10: Fix Guide

Updated 2026-07-28 13:48:02macos-help
Fix VS Code Git Authentication Failed Keychain Error - Git Push Rejected: Non Fast-Forward Fix Guide-Missing Taskbar Icons in Windows 10: Fix Guide
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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