Title: Fatal error: Call to undefined function __doing_it_wrong()
Last modified: December 18, 2025

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# Fatal error: Call to undefined function __doing_it_wrong()

 *  Resolved [Machtnix](https://wordpress.org/support/users/hillyfov/)
 * (@hillyfov)
 * [3 months, 3 weeks ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-__doing_it_wrong/)
 * Hey folks,
 * after the latest update I encountered a fatal error that broke my site. The debug
   log reads:
 * PHP Fatal error: Uncaught Error: Call to undefined function __doing_it_wrong()
   in /wp-content/plugins/cryptx/cryptx.php:201
 * I disabled CryptX for now to make the site available again so it’s not a big 
   problem but I thought you might want to look into it.
 * Thanks!

Viewing 1 replies (of 1 total)

 *  Plugin Author [Ralf Weber](https://wordpress.org/support/users/d3395/)
 * (@d3395)
 * [3 months, 3 weeks ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-__doing_it_wrong/#post-18760387)
 * Thank you for the feedback. I have fixed the bug in version 4.0.11.

Viewing 1 replies (of 1 total)

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## Tags

 * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/)
 * [undefined function](https://wordpress.org/support/topic-tag/undefined-function/)

 * 2 replies
 * 2 participants
 * Last reply from: [Ralf Weber](https://wordpress.org/support/users/d3395/)
 * Last activity: [3 months, 3 weeks ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-__doing_it_wrong/#post-18760387)
 * Status: resolved