/cloudflare-errors/

Cloudflare Errors and Troubleshooting

Diagnose Cloudflare 5xx errors, SSL mode conflicts, firewall blocks, cache serving old content, and Rocket Loader side effects.

45 topics · 1 published guides

Common symptoms

Cloudflare-branded 520–526 pages
Flexible SSL redirect loops
wp-admin or REST API blocked
Old CSS or pages after updates
Challenge loop for legitimate visitors

Start here

01 Note the exact Cloudflare error code
02 Test with proxy paused (DNS only) if safe
03 Confirm SSL/TLS mode matches the origin certificate
04 Review firewall, WAF, and rate limiting events

Most common problems

6 signals

522 Intermediate Cloudflare Errors

Cloudflare error 522

Learn what causes “Cloudflare error 522,” how to recognize symptoms, and safe steps to diagnose and repair the problem.

Visitors or admins encounter: Cloudflare error 522

On the board Intermediate

Cloudflare blocking wp-admin

Learn what causes “Cloudflare blocking wp-admin,” how to recognize symptoms, and safe steps to diagnose and repair the problem.

On the board Intermediate

Cloudflare error 520

Learn what causes “Cloudflare error 520,” how to recognize symptoms, and safe steps to diagnose and repair the problem.

On the board Intermediate

Cloudflare error 521

Learn what causes “Cloudflare error 521,” how to recognize symptoms, and safe steps to diagnose and repair the problem.

On the board Intermediate

Cloudflare error 524

Learn what causes “Cloudflare error 524,” how to recognize symptoms, and safe steps to diagnose and repair the problem.

On the board Intermediate

Cloudflare error 525

Learn what causes “Cloudflare error 525,” how to recognize symptoms, and safe steps to diagnose and repair the problem.

All problems in this category

Showing 45 topics · 1 published guides

522P1 · intermediate
Cloudflare error 522
Learn what causes “Cloudflare error 522,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
P2 · intermediate
Cloudflare blocking wp-admin
Learn what causes “Cloudflare blocking wp-admin,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
520P2 · intermediate
Cloudflare error 520
Learn what causes “Cloudflare error 520,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
521P2 · intermediate
Cloudflare error 521
Learn what causes “Cloudflare error 521,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
524P2 · intermediate
Cloudflare error 524
Learn what causes “Cloudflare error 524,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
525P2 · intermediate
Cloudflare error 525
Learn what causes “Cloudflare error 525,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P2 · intermediate
Cloudflare flexible SSL redirect loop
Learn what causes “Cloudflare flexible SSL redirect loop,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P2 · intermediate
Cloudflare Rocket Loader broke website
Learn what causes “Cloudflare Rocket Loader broke website,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P2 · intermediate
Cloudflare too many redirects
Learn what causes “Cloudflare too many redirects,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare access denied
Learn what causes “Cloudflare access denied,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare APO issue
Learn what causes “Cloudflare APO issue,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare blocking REST API
Learn what causes “Cloudflare blocking REST API,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare blocking XML-RPC
Learn what causes “Cloudflare blocking XML-RPC,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare bot protection blocking legitimate visitors
Learn what causes “Cloudflare bot protection blocking legitimate visitors,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare cache not clearing
Learn what causes “Cloudflare cache not clearing,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare challenge loop
Learn what causes “Cloudflare challenge loop,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare development mode not working
Learn what causes “Cloudflare development mode not working,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare DNS not working
Learn what causes “Cloudflare DNS not working,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare DNS record proxied incorrectly
Learn what causes “Cloudflare DNS record proxied incorrectly,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare email routing not working
Learn what causes “Cloudflare email routing not working,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
1000P3 · advanced
Cloudflare error 1000
Learn what causes “Cloudflare error 1000,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
1001P3 · advanced
Cloudflare error 1001
Learn what causes “Cloudflare error 1001,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
1002P3 · advanced
Cloudflare error 1002
Learn what causes “Cloudflare error 1002,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
1003P3 · advanced
Cloudflare error 1003
Learn what causes “Cloudflare error 1003,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
1004P3 · advanced
Cloudflare error 1004
Learn what causes “Cloudflare error 1004,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
1014P3 · advanced
Cloudflare error 1014
Learn what causes “Cloudflare error 1014,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
1015P3 · advanced
Cloudflare error 1015
Learn what causes “Cloudflare error 1015,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
1016P3 · advanced
Cloudflare error 1016
Learn what causes “Cloudflare error 1016,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
1020P3 · advanced
Cloudflare error 1020
Learn what causes “Cloudflare error 1020,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
523P3 · advanced
Cloudflare error 523
Learn what causes “Cloudflare error 523,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
526P3 · advanced
Cloudflare error 526
Learn what causes “Cloudflare error 526,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare firewall blocking visitors
Learn what causes “Cloudflare firewall blocking visitors,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare firewall blocking WordPress
Learn what causes “Cloudflare firewall blocking WordPress,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare full SSL error
Learn what causes “Cloudflare full SSL error,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare full strict SSL error
Learn what causes “Cloudflare full strict SSL error,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare human verification loop
Learn what causes “Cloudflare human verification loop,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare image optimization broke images
Learn what causes “Cloudflare image optimization broke images,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare origin certificate error
Learn what causes “Cloudflare origin certificate error,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare origin server unreachable
Learn what causes “Cloudflare origin server unreachable,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare page rule not working
Learn what causes “Cloudflare page rule not working,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare proxy not working
Learn what causes “Cloudflare proxy not working,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare redirect rule not working
Learn what causes “Cloudflare redirect rule not working,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare serving old CSS
Learn what causes “Cloudflare serving old CSS,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare serving old website
Learn what causes “Cloudflare serving old website,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon
P3 · advanced
Cloudflare website slow
Learn what causes “Cloudflare website slow,” how to recognize symptoms, and safe steps to diagnose and repair the problem.
Coming soon

Related categories

Frequently asked questions

Does error 522 mean WordPress crashed? +

Not necessarily. 522 means Cloudflare timed out connecting to your origin—often firewall, downed server, or wrong origin IP.

Repair dispatch

Still Need Help Fixing Your Website?

If you are not comfortable editing website files, changing server settings, repairing a database, or troubleshooting a live website, professional help may prevent additional damage or downtime. We will review the problem before accepting the repair.

You will receive a clear explanation of the likely cause.
We will tell you if the issue falls outside our repair scope.
No additional work will be performed without approval.
A backup should be created whenever access and website condition allow it.

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