Title: Fatal error: Cannot declare class Elementor\Controls_Stack
Last modified: November 1, 2019

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# Fatal error: Cannot declare class Elementor\Controls_Stack

 *  Resolved [a1me](https://wordpress.org/support/users/a1me/)
 * (@a1me)
 * [6 years, 7 months ago](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-elementorcontrols_stack/)
 * Hi,
    I have this theme Draven in my WP site
 * when I try to active your plugin. I get Fatal Error (below) and all site breaks.
   
   Fatal error: Cannot declare class Elementor\Controls_Stack, because the name 
   is already in use in C:\xampp\htdocs\draven\wp-content\plugins\lastudio-elements\
   override\includes\base\controls-stack.php on line 2032 The site is experiencing
   technical difficulties. Please check your site admin email inbox for instructions.
 * Note: the line 2032 in controls-stack.php is the last line in the file.
 * any help please?
    -  This topic was modified 6 years, 6 months ago by [Jan Dembowski](https://wordpress.org/support/users/jdembowski/).

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Thread Starter [a1me](https://wordpress.org/support/users/a1me/)
 * (@a1me)
 * [6 years, 7 months ago](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-elementorcontrols_stack/#post-12085795)
 * in admin email nothing found.
 *  Plugin Author [WebMat](https://wordpress.org/support/users/webmatpro/)
 * (@webmatpro)
 * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-elementorcontrols_stack/#post-12086693)
 * Hello,
 * can you share me the file “controls-stack.php” by [https://wetransfer.com](https://wetransfer.com)
   please
 * Thanks.
 *  Thread Starter [a1me](https://wordpress.org/support/users/a1me/)
 * (@a1me)
 * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-elementorcontrols_stack/#post-12092893)
 * here you are
    [controls stack file](https://we.tl/t-VHA0C894Oy)
 * note: after I deactivate the plugin ( lastudio-elements) your plugin worked fine,
   but when I activate it again, your plugin stopped again and got the same error
   message>
 * here is the theme that I talk about it
    [draven](https://themeforest.net/item/draven-multipurpose-creative-theme/23114330)
 *  Plugin Author [WebMat](https://wordpress.org/support/users/webmatpro/)
 * (@webmatpro)
 * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-elementorcontrols_stack/#post-12094039)
 * Thanks you,
 * the plugin use the class “Controls_Stack” and can’t redeclare it if some plugin
   or theme use already it.
 * In FEP, any class “Controls_Stack” exist, are you sure the problem come from 
   FEP?
 * Do you tried with all plugins desactived then active the plugin “lastudio-elements”?

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Fatal error: Cannot declare class Elementor\Controls_Stack’ is closed
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 * ![](https://ps.w.org/flexible-elementor-panel/assets/icon-256x256.png?rev=3456895)
 * [Flexible Editor Panel for Elementor](https://wordpress.org/plugins/flexible-elementor-panel/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/flexible-elementor-panel/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/flexible-elementor-panel/)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/flexible-elementor-panel/unresolved/)
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## Tags

 * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/)

 * 4 replies
 * 2 participants
 * Last reply from: [WebMat](https://wordpress.org/support/users/webmatpro/)
 * Last activity: [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-cannot-declare-class-elementorcontrols_stack/#post-12094039)
 * Status: resolved