Title: restoring WP, reports stack-cache error
Last modified: May 19, 2025

---

# restoring WP, reports stack-cache error

 *  Resolved [nakup36](https://wordpress.org/support/users/nakup36/)
 * (@nakup36)
 * [1 year ago](https://wordpress.org/support/topic/restoring-wp-reports-stack-cache-error/)
 * Hi,
 * When I restore WP from backup, the backup does not complete and stops at 85%.
   A critical error is reported when the page is restored:
   Warning: require(/usr/
   share/php/wp-stack-cache.php): failed to open stream: no such file or directory
   in /www/konferencesvm.cz/wp-content/mu-plugins/wp-stack-cache.php on line 31.
 * Fatal error:(include_path=’.:/usr/share/pear:/usr/share/php:/www/konferencesvm.
   cz:/www/konferencesvm.cz-tmpdir’) in /www/konferencesvm.cz/konferencesvm. cz/
   wp-content/mu-plugins/wp-stack-cache.php:31 Stack trace: #0 /www/konferencesvm.
   cz/konferencesvm.cz/wp-settings.php(456): include_once() #1 /www/konferencesvm.
   cz/konferencesvm.cz/wp-config.php(26): require_once(‘…’) #2 /www/konferencesvm.
   cz/konferencesvm.cz/wp-load. php(50): require_once(‘…’) #3 /www/konferencesvm.
   cz/konferencesvm.cz/wp-admin/admin.php(35): require_once(‘…’) #4 {main} thrown
   in /www/konferencesvm.cz/konferencesvm.cz/wp-content/mu-plugins/wp-stack-cache.
   php on line 31
 * Only deleting the wo-stack-cache file in mu-cache will help.
 * Thank you in advance for your help.
 * Translated with DeepL.com (free version)
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Frestoring-wp-reports-stack-cache-error%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Author [Yani](https://wordpress.org/support/users/yaniiliev/)
 * (@yaniiliev)
 * [1 year ago](https://wordpress.org/support/topic/restoring-wp-reports-stack-cache-error/#post-18472808)
 * Thanks for the report. The issue was caused by a mu-plugin (wp-stack-cache.php)
   that references a server-specific path. These kinds of plugins are often installed
   by hosting providers and aren’t portable, which is why the restore failed at 
   85%.
 * You’re correct that deleting that file resolves the issue.
 * If you’re using the [Unlimited Extension](https://servmask.com/products/unlimited-extension),
   you can exclude mu-plugins or specific problematic plugins during export to avoid
   this kind of issue in the future. Let us know if you’d like help setting that
   up.
 * Let us know if everything’s working now or if you need further assistance.

Viewing 1 replies (of 1 total)

The topic ‘restoring WP, reports stack-cache error’ is closed to new replies.

 * ![](https://ps.w.org/all-in-one-wp-migration/assets/icon-256x256.png?rev=2458334)
 * [All-in-One WP Migration and Backup](https://wordpress.org/plugins/all-in-one-wp-migration/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/all-in-one-wp-migration/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/all-in-one-wp-migration/)
 * [Active Topics](https://wordpress.org/support/plugin/all-in-one-wp-migration/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/all-in-one-wp-migration/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/all-in-one-wp-migration/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [Yani](https://wordpress.org/support/users/yaniiliev/)
 * Last activity: [1 year ago](https://wordpress.org/support/topic/restoring-wp-reports-stack-cache-error/#post-18472808)
 * Status: resolved