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GitHub Actions YAML Syntax Error: How to Fix - How to Fix 'Could not get lock' in Ubuntu APT-Resolve PowerShell 504 Error When Calling REST APIs

2026-06-14 00:13:10developer-tools

GitHub Actions YAML Syntax Error: How to Fix - How to Fix 'Could not get lock' in Ubuntu APT-Resolve PowerShell 504 Error When Calling REST APIs

Final checklist

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