Title: Fatal error: Cannot declare class WP_REST_Navigation_Fallback_Controller
Last modified: August 12, 2023

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# Fatal error: Cannot declare class WP_REST_Navigation_Fallback_Controller

 *  [brayanaspi](https://wordpress.org/support/users/brayanaspi/)
 * (@brayanaspi)
 * [2 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-wp_rest_navigation_fallback_controller/)
 * Hi
 * I did not update or installed a new plug in, just mi webpage did not work.
 * appers
 * **Fatal error**: Cannot declare class WP_REST_Navigation_Fallback_Controller,
   because the name is already in use in **/home/customer/www/miss-flores.com/public_html/
   wp-content/plugins/gutenberg/lib/experimental/class-wp-rest-navigation-fallback-
   controller.php** on line **0**
 * Does someone had the same problem, i had to restore an old back up, i think is
   for woordpress 6.3 I’m not really sure .
 * please help
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ffatal-error-cannot-declare-class-wp_rest_navigation_fallback_controller%2Fpage%2F2%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 16 through 17 (of 17 total)

[←](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-wp_rest_navigation_fallback_controller/?output_format=md)
[1](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-wp_rest_navigation_fallback_controller/?output_format=md)
2

 *  Thread Starter [brayanaspi](https://wordpress.org/support/users/brayanaspi/)
 * (@brayanaspi)
 * [2 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-wp_rest_navigation_fallback_controller/page/2/#post-16975600)
 * The solution that worked for me was to restore the last back up and update all
   the plugins and then to update the wordpress version. I tried the other recomendations
   on the comments none of them worked.
 * I restore with the back up generated automatically by siteground..
 *  [bradwp381](https://wordpress.org/support/users/bradwp381/)
 * (@bradwp381)
 * [2 years, 9 months ago](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-wp_rest_navigation_fallback_controller/page/2/#post-16985783)
 * Just wanted to chime in to say the solution that worked for me was to restore
   to an old backup. Flush the cache and then update the plugins. After doing that
   I updated wordpress. No issues viewing the site after flushing cache again. Hope
   this helps someone.

Viewing 2 replies - 16 through 17 (of 17 total)

[←](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-wp_rest_navigation_fallback_controller/?output_format=md)
[1](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-wp_rest_navigation_fallback_controller/?output_format=md)
2

The topic ‘Fatal error: Cannot declare class WP_REST_Navigation_Fallback_Controller’
is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 17 replies
 * 6 participants
 * Last reply from: [bradwp381](https://wordpress.org/support/users/bradwp381/)
 * Last activity: [2 years, 9 months ago](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-wp_rest_navigation_fallback_controller/page/2/#post-16985783)
 * Status: not resolved

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