Title: Error after installing plugin
Last modified: August 31, 2016

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# Error after installing plugin

 *  Resolved [bsniekers](https://wordpress.org/support/users/bsniekers/)
 * (@bsniekers)
 * [10 years ago](https://wordpress.org/support/topic/error-after-installing-plugin-5/)
 * I get the following error when accessing any page in my WordPress installation,
   after installing your plugin:
 * Fatal error: Call to undefined function set_url_scheme() in /home/furball/domains/
   furball.nl/public_html/wordpress/wp-content/plugins/facebook-conversion-pixel/
   includes/cmb2/includes/CMB2_Utils.php on line 176
 * There is no way or me to go back to my control panel to deactivate your plugin,
   because any wp-admin/* page throws this error. Please HELP!
 * [https://wordpress.org/plugins/facebook-conversion-pixel/](https://wordpress.org/plugins/facebook-conversion-pixel/)

Viewing 1 replies (of 1 total)

 *  [Justin Sternberg](https://wordpress.org/support/users/jtsternberg/)
 * (@jtsternberg)
 * [10 years ago](https://wordpress.org/support/topic/error-after-installing-plugin-5/#post-7377484)
 * To the plugin author, you ought to bump your plugin minimum required WP version
   to at least 3.8 to match CMB2’s minimum.
 * bsniekers, if you have ftp access, you can go rename this plugin in the plugin’s
   directory, and it will deactivate automatically. Also, `set_url_scheme()` has
   been available in WordPress since 3.4. Do you have a version older than that?
   If so, I imagine this isn’t the first or last time you’ll have errors from plugins
   like this.

Viewing 1 replies (of 1 total)

The topic ‘Error after installing plugin’ is closed to new replies.

 * ![](https://ps.w.org/facebook-conversion-pixel/assets/icon-256x256.gif?rev=2922077)
 * [Pixel Cat - Conversion Pixel Manager](https://wordpress.org/plugins/facebook-conversion-pixel/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/facebook-conversion-pixel/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/facebook-conversion-pixel/)
 * [Active Topics](https://wordpress.org/support/plugin/facebook-conversion-pixel/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/facebook-conversion-pixel/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/facebook-conversion-pixel/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [Justin Sternberg](https://wordpress.org/support/users/jtsternberg/)
 * Last activity: [10 years ago](https://wordpress.org/support/topic/error-after-installing-plugin-5/#post-7377484)
 * Status: resolved