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Fix Docker Compose Environment Variable Substitution Failed - Fix Docker Pull Access Denied: Authentication Required-Fixing a Detached HEAD State in Visual Studio Code

2026-07-28 14:44:40developer-tools
Fix Docker Compose Environment Variable Substitution Failed - Fix Docker Pull Access Denied: Authentication Required-Fixing a Detached HEAD State in Visual Studio Code

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.

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