Title: Error PluginOrganizerMU.class.php
Last modified: December 20, 2017

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# Error PluginOrganizerMU.class.php

 *  Resolved [Will B](https://wordpress.org/support/users/willians-biehl/)
 * (@willians-biehl)
 * [8 years, 5 months ago](https://wordpress.org/support/topic/error-pluginorganizermu-class-php/)
 * When I update PO, the “PluginOrganizerMU.class.php” file in the mu-plugins directory
   is updated every second. By displaying in the panel the message “You are running
   an old version of the MU Plugin. Please use the tool provided on the settings
   page to move the version updated to place or manually copy …”
 * Even if you do the process manually, the message continues and I can not enable
   PO. Doing the downgrade everything works again.

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

 *  Plugin Author [Jeff Sterup](https://wordpress.org/support/users/foomagoo/)
 * (@foomagoo)
 * [8 years, 5 months ago](https://wordpress.org/support/topic/error-pluginorganizermu-class-php/#post-9800623)
 * It sounds like you are running a caching plugin that is keeping the wordpress
   options pulled from the database cached. Plugin Organizer checks to make sure
   you are using the same version in the MU and standard plugins to prevent any 
   problems caused by running an older version of either plugin. If you have a caching
   plugin you need to clear it’s cache after updating.
 *  Thread Starter [Will B](https://wordpress.org/support/users/willians-biehl/)
 * (@willians-biehl)
 * [8 years, 5 months ago](https://wordpress.org/support/topic/error-pluginorganizermu-class-php/#post-9814900)
 * Thank you Jeff Sterup. According to your recommendations, I solved the problem.

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

The topic ‘Error PluginOrganizerMU.class.php’ is closed to new replies.

 * ![](https://ps.w.org/plugin-organizer/assets/icon-256x256.png?rev=1786554)
 * [Plugin Organizer](https://wordpress.org/plugins/plugin-organizer/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/plugin-organizer/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/plugin-organizer/)
 * [Active Topics](https://wordpress.org/support/plugin/plugin-organizer/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/plugin-organizer/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/plugin-organizer/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [Will B](https://wordpress.org/support/users/willians-biehl/)
 * Last activity: [8 years, 5 months ago](https://wordpress.org/support/topic/error-pluginorganizermu-class-php/#post-9814900)
 * Status: resolved