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Fix Docker Build Unauthorized Authentication Required Error - FFmpeg MP4 Audio Out of Sync: How to Fix-Resolve npm Cache Permission Issues on macOS/Linux

2026-06-14 17:29:12
Fix Docker Build Unauthorized Authentication Required Error - FFmpeg MP4 Audio Out of Sync: How to Fix-Resolve npm Cache Permission Issues on macOS/Linux

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

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