Title: Fatal error after plugin install Last modified: August 21, 2016 --- # Fatal error after plugin install * Resolved [beda69](https://wordpress.org/support/users/beda69/) * (@beda69) * [12 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-after-plugin-install-3/) * Hi there! plugin works fine, but a after installation and cloning of one of my example sites, i am not able anymore to install any themes from the WP “new themes” directory. is it possible that this plugin is the reason? (since it interacts pretty deep in the tables of my WP install… i become following error message when i try to install any new theme: (when i try to look up new change logs of themes with a update option): “Fatal error: Class ‘WP_Theme_Install_List_Table’ not found in /home/bschmid/public_html/wp-content/plugins/installer/tables/wprc- theme-install-list-table.php on line 2” and if i try to find new themes over the theme search function of my WP-admin panel: ” An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums.” * maybe, so i thought since te installation of this plugin was the only change i made before this issue happened, you know what the problem is? apart of this issue, your plugin is awesome and saved me a lot of work….. * [https://wordpress.org/plugins/multisite-cloner/](https://wordpress.org/plugins/multisite-cloner/) Viewing 9 replies - 1 through 9 (of 9 total) * Plugin Author [Manuel Razzari](https://wordpress.org/support/users/manuelrazzari/) * (@manuelrazzari) * [12 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-after-plugin-install-3/#post-5068626) * Hello, it looks like you have a plugin called “installer” which is causing the error. Did you try disabling or deleting that plugin? Also try disabling multisite cloner… Disable them one by one, and try again, to isolate the problem. * FWIW, this plugin doesn’t change any existing tables in your install. So even in case there was a bug, it would injury impact new sites, not existing ones. * Let me know how that goes! * Thread Starter [beda69](https://wordpress.org/support/users/beda69/) * (@beda69) * [12 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-after-plugin-install-3/#post-5068631) * HI! grate! it was “installer” plugin. wondering why, since i have this plugin running since months and never got troubles, until today. maybe compatibility problems with “multisite cloner”? ((i don’t see the reason of but i am not very good in those things 🙂 ) anyway thanks for the unusual fast help, and thank you for the grate plugin, will give a rate 🙂 beda * Plugin Author [Manuel Razzari](https://wordpress.org/support/users/manuelrazzari/) * (@manuelrazzari) * [12 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-after-plugin-install-3/#post-5068642) * Thanks for the rate, appreciated! * Just to confirm if it’s a conflict, you could try disabling multisite-cloner but not “installer”… * If it’s indeed a conflict, I’ll install both on a test server, and investigate! * Thread Starter [beda69](https://wordpress.org/support/users/beda69/) * (@beda69) * [12 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-after-plugin-install-3/#post-5068770) * hi. sorry for te late replay. it is definitely a conflict with “installer”. i deleted both and re-installed one by one. multisite cloner works fine, till installer is installed. thank you, beda * Plugin Author [Manuel Razzari](https://wordpress.org/support/users/manuelrazzari/) * (@manuelrazzari) * [12 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-after-plugin-install-3/#post-5068781) * Uhm. I’ll install both on a test server, investigate, and get back to you! Thanks for the update! * Plugin Author [Manuel Razzari](https://wordpress.org/support/users/manuelrazzari/) * (@manuelrazzari) * [12 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-after-plugin-install-3/#post-5068782) * This [http://wp-compatibility.com/installer-plugin](http://wp-compatibility.com/installer-plugin) is the plugin you’re referring to, right? * Thread Starter [beda69](https://wordpress.org/support/users/beda69/) * (@beda69) * [12 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-after-plugin-install-3/#post-5068783) * yes, that is the plugin. honestly i think it is a useless plugin, as it does not really help to personalize the wp interface, but makes it easier to install and update plugins…. thank you! beda * Thread Starter [beda69](https://wordpress.org/support/users/beda69/) * (@beda69) * [12 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-after-plugin-install-3/#post-5068784) * yes, that is the plugin. honestly i think it is a useless plugin, as it does not really help to personalize the wp interface, but makes it easier to install and update plugins…. thank you! beda * Plugin Author [Manuel Razzari](https://wordpress.org/support/users/manuelrazzari/) * (@manuelrazzari) * [12 years ago](https://wordpress.org/support/topic/fatal-error-after-plugin-install-3/#post-5068817) * Hello Beda69. After some testing, I’ve verified that the bug you’re noticing is **totally unrelated** to the multisite-cloner plugin. * It’s actually [a bug](http://wpml.org/forums/topic/fatal-error-when-seracing-for-themes-installer-plugin-activate-the-problem/) in the installer plugin, and the bug is present in a fresh WP install without our plugin being installed. * As you can see in the link above, this is a bug acknowledged by the installer plugin’s author, so I’ll mark this support issue as resolved. * Thanks, and please rate this plugin if you like it 🙂 Viewing 9 replies - 1 through 9 (of 9 total) The topic ‘Fatal error after plugin install’ is closed to new replies. * ![](https://ps.w.org/multisite-cloner/assets/icon-256x256.png?rev=1067125) * [Multisite Cloner](https://wordpress.org/plugins/multisite-cloner/) * [Frequently Asked Questions](https://wordpress.org/plugins/multisite-cloner/#faq) * [Support Threads](https://wordpress.org/support/plugin/multisite-cloner/) * [Active Topics](https://wordpress.org/support/plugin/multisite-cloner/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/multisite-cloner/unresolved/) * [Reviews](https://wordpress.org/support/plugin/multisite-cloner/reviews/) ## Tags * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/) * 9 replies * 2 participants * Last reply from: [Manuel Razzari](https://wordpress.org/support/users/manuelrazzari/) * Last activity: [12 years ago](https://wordpress.org/support/topic/fatal-error-after-plugin-install-3/#post-5068817) * Status: resolved