Title: error 500
Last modified: June 16, 2026

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# error 500

 *  [thriallis](https://wordpress.org/support/users/thriallis/)
 * (@thriallis)
 * [2 weeks, 5 days ago](https://wordpress.org/support/topic/error-500-268/)
 * i have two sites candlemaker.gr and thriallis.com i stopped some autoloads of
   jetpack and since then i receive an error 500 when i try to activate jetpacl 
   to both of them.Debugger says everything is ok. i deleted with sql every jetpack
   line from database i deleted jetpack and i installed it again, i deactivate all
   plugins but still the same. xmlrpc is ok. What i have to do? i think for some
   reason it has a problem with wordpress. The second site appears in my wordpress
   account but the first not
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-500-268%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Support [Alin (a11n)](https://wordpress.org/support/users/alinclamba/)
 * (@alinclamba)
 * [1 week, 6 days ago](https://wordpress.org/support/topic/error-500-268/#post-18944772)
 * Hi [@thriallis](https://wordpress.org/support/users/thriallis/),
 * I took a look at your sites and found the cause of the Error 500 when activating
   Jetpack.
 * **The Issue**
 * Your site has a security feature that’s putting a Cloudflare Turnstile human 
   verification
   challenge in front of your XML-RPC endpoint. When Jetpack (or WordPress.
   com) tries to connect to[https://candlemaker.gr/xmlrpc.php](https://candlemaker.gr/xmlrpc.php),
   instead of getting the expected XML-RPC response, it receivesan HTML page asking
   for human verification.
 * Since Jetpack relies on server-to-server communication that cannot complete a
   CAPTCHA challenge,
   the connection fails.
 * **How to Fix This**
 * You need to allowlist XML-RPC from this bot protection. Depending on where it’s
   configured:
    1. Check with your hosting provider – Many hosts add security rules that protect
       XML-RPC. Contact
       your host and ask them to whitelist WordPress.com/Jetpack from
       any bot protection on /xmlrpc.php.
    2. Check any security plugins – If you’re using a security plugin (Wordfence, Sucuri,
       iThemes
       Security, etc.), look for settings related to XML-RPC protection or 
       bot challenges and disablethem or whitelist Jetpack.
    3. If using Cloudflare directly – Create a firewall rule to skip challenges for
       requests to
       /xmlrpc.php from Jetpack IPs. You can find the list of Jetpack IP
       addresses to whitelist here:[https://jetpack.com/support/how-to-add-jetpack-ips-allowlist/](https://jetpack.com/support/how-to-add-jetpack-ips-allowlist/)
 * Once XML-RPC is accessible without the human verification challenge, you should
   be able to
   activate and connect Jetpack normally. Let us know if you need further
   assistance!
 *  Plugin Contributor [Stef (a11n)](https://wordpress.org/support/users/erania-pinnera/)
 * (@erania-pinnera)
 * [5 days, 23 hours ago](https://wordpress.org/support/topic/error-500-268/#post-18951717)
 * Hi there, [@thriallis](https://wordpress.org/support/users/thriallis/),
 * Do you have updates about that, do you still need help? We usually close inactive
   threads after one week of no movement, but we want to make sure we’re all set
   before marking it as solved. Thanks!

Viewing 2 replies - 1 through 2 (of 2 total)

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 * 2 replies
 * 3 participants
 * Last reply from: [Stef (a11n)](https://wordpress.org/support/users/erania-pinnera/)
 * Last activity: [5 days, 23 hours ago](https://wordpress.org/support/topic/error-500-268/#post-18951717)
 * Status: not resolved