Title: Error Class ‘WP_REST_Controller’ not found
Last modified: October 27, 2021

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# Error Class ‘WP_REST_Controller’ not found

 *  Resolved [giane98](https://wordpress.org/support/users/giane98/)
 * (@giane98)
 * [4 years, 7 months ago](https://wordpress.org/support/topic/error-class-wp_rest_controller-not-found/)
 * Hi, I tried to install your plugin but after activating it the website went down
   with 500 error code, in the webserver log I saw the error was:
 * “PHP Fatal error: Uncaught Error: Class ‘WP_REST_Controller’ not found in _/plugins/
   weforms/includes/api/class-weforms-api-rest-controller.php on line 3”
 * WP Version: WordPress 4.4.25
    -  This topic was modified 4 years, 7 months ago by [giane98](https://wordpress.org/support/users/giane98/).

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

 *  [Elana Davis](https://wordpress.org/support/users/elanasparkle/)
 * (@elanasparkle)
 * [4 years, 7 months ago](https://wordpress.org/support/topic/error-class-wp_rest_controller-not-found/#post-15012668)
 * Hello [@giane98](https://wordpress.org/support/users/giane98/),
 * ​Thank you for reaching out to support! That error should be resolved in a newer
   version of WordPress. weForms does use the Rest API which WordPress has updated
   significantly recently. Are you able to update your WordPress to at least 5.5?
 * Thanks
    Elana D.
 *  [Elana Davis](https://wordpress.org/support/users/elanasparkle/)
 * (@elanasparkle)
 * [4 years, 6 months ago](https://wordpress.org/support/topic/error-class-wp_rest_controller-not-found/#post-15050857)
 * Hello [@giane98](https://wordpress.org/support/users/giane98/)
 * We haven’t heard from you in a while I’m going to go ahead and close this out
   and don’t hesitate to reach out if you are still having a problem.
 * Thanks
    Elana D.

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

The topic ‘Error Class ‘WP_REST_Controller’ not found’ is closed to new replies.

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 * 2 replies
 * 2 participants
 * Last reply from: [Elana Davis](https://wordpress.org/support/users/elanasparkle/)
 * Last activity: [4 years, 6 months ago](https://wordpress.org/support/topic/error-class-wp_rest_controller-not-found/#post-15050857)
 * Status: resolved