Title: Error
Last modified: December 9, 2025

---

# Error

 *  Resolved [alexti](https://wordpress.org/support/users/alexti/)
 * (@alexti)
 * [6 months ago](https://wordpress.org/support/topic/error-1959/)
 * Error appears after update.
 * **
   2025-12-08T08:17:18+00:00
    Critical Uncaught Error: Class “WpRollback\Free\
   PluginSetup\Language” not found in /www/apache/domains//htdocs/wp-content/plugins/
   wp-rollback/src/PluginSetup/PluginSetup.php:125
 *     ```wp-block-code
       Additional context{"error": {"type": 1,"file": "/www/apache/domains///htdocs/wp-content/plugins/wp-rollback/src/PluginSetup/PluginSetup.php","line": 125},"remote-logging": true,"backtrace": ["","#0 /www/apache/domains///htdocs/wp-content/plugins/wp-rollback/src/PluginSetup/PluginSetup.php(99): WpRollback\Free\PluginSetup\PluginSetup->setupLanguage()","#1 /www/apache/domains///htdocs/wp-includes/class-wp-hook.php(324): WpRollback\Free\PluginSetup\PluginSetup->init('')","#2 /www/apache/domains///htdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)","#3 /www/apache/domains///htdocs/wp-includes/plugin.php(517): WP_Hook->do_action(Array)","#4 /www/apache/domains///htdocs/wp-settings.php(578): do_action('plugins_loaded')","#5 /www/apache/domains///htdocs/wp-config.php(111): require_once('/www/apache/dom…')","#6 /www/apache/domains///htdocs/wp-load.php(50): require_once('/www/apache/dom…')","#7 /www/apache/domains///htdocs/wp-cron.php(46): require_once('/www/apache/dom…')","#8 {main}","thrown"]}
       ```
   

Viewing 1 replies (of 1 total)

 *  Plugin Author [Devin Walker](https://wordpress.org/support/users/dlocc/)
 * (@dlocc)
 * [3 months, 1 week ago](https://wordpress.org/support/topic/error-1959/#post-18836226)
 * Hi @alexti,
 * Thanks for reporting this, and apologies for the super late reply. We’ve investigated
   the issue thoroughly and confirmed that the Language class and its autoloader
   entry are correctly included in the plugin distribution. The source file, namespace,
   PSR-4 autoloading configuration, Composer classmap, and final zip package are
   all correct. This error is most likely caused by one of the following:
    1. An incomplete plugin update — If the update process was interrupted (e.g., due
       to a timeout or server issue), some files may not have been fully extracted.
       This would leave the autoloader referencing files that don’t exist on disk.
    2. PHP OPcache serving stale data — After an update, your server’s opcode cache
       may still be serving the old autoloader classmap that doesn’t include the new
       class.
 * To resolve this, please try the following:
    1. Deactivate and delete the WP Rollback plugin.
    2. If your hosting provides an option to purge PHP OPcache (often in cPanel or 
       your hosting dashboard), do that as well.
    3. Reinstall WP Rollback fresh from the WordPress.org plugin directory.
 * This should give you a clean installation with all files properly in place. If
   the error persists after a fresh install, please let us know and we’ll dig deeper.

Viewing 1 replies (of 1 total)

You must be [logged in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-1959%2F%3Foutput_format%3Dmd&locale=en_US)
to reply to this topic.

 * ![](https://ps.w.org/wp-rollback/assets/icon-256x256.jpg?rev=3014868)
 * [WP Rollback - Rollback Plugins and Themes](https://wordpress.org/plugins/wp-rollback/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-rollback/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-rollback/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-rollback/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-rollback/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-rollback/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [Devin Walker](https://wordpress.org/support/users/dlocc/)
 * Last activity: [3 months, 1 week ago](https://wordpress.org/support/topic/error-1959/#post-18836226)
 * Status: resolved