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How to Fix Cloudflare 521 Error with Firewall Settings - How to Resolve Windows Defender Error 0x800704ec-Debug React Apps: VS Code Breakpoint Troubleshooting

2026-07-28 17:23:40
How to Fix Cloudflare 521 Error with Firewall Settings - How to Resolve Windows Defender Error 0x800704ec-Debug React Apps: VS Code Breakpoint Troubleshooting

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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