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How to Fix Cloudflare 521 Error (Port 443 Blocked) - Docker Compose .env Not Loading: How to Fix-Edge Sync Not Syncing After Update Fix

2026-07-28 12:50:37
How to Fix Cloudflare 521 Error (Port 443 Blocked) - Docker Compose .env Not Loading: How to Fix-Edge Sync Not Syncing After Update Fix

Result check

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

Next references

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