Title: Failed opening required sub-controls-stack.php
Last modified: January 30, 2021

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# Failed opening required sub-controls-stack.php

 *  Resolved [stlecho](https://wordpress.org/support/users/stlecho/)
 * (@stlecho)
 * [5 years, 4 months ago](https://wordpress.org/support/topic/failed-opening-required-sub-controls-stack-php/)
 * I’ve installed the latest version of the Elementor plugin on WordPress 5.5.3 
   and in the log I see the error shown underneath. What could be the cause of this
   error ?
 *  AH01071: Got error ‘PHP message: PHP Fatal error: require(): Failed opening 
   required ‘/var/www/vhosts/vbsdebrongooik.be/httpdocs/wp-content/plugins/elementor//
   includes/base/sub-controls-stack.php’ (include_path=’.:’) in /var/www/vhosts/
   vbsdebrongooik.be/httpdocs/wp-content/plugins/elementor/includes/autoloader.php
   on line 294PHP message: PHP Stack trace:PHP message: PHP 1. {main}() /var/www/
   vhosts/vbsdebrongooik.be/httpdocs/index.php:0PHP message: PHP 2. require() /var/
   www/vhosts/vbsdebrongooik.be/httpdocs/index.php:17PHP message: PHP 3. require_once()/
   var/www/vhosts/vbsdebrongooik.be/httpdocs/wp-blog-header.php:13PHP message: PHP
   4. require_once() /var/www/vhosts/vbsdebrongooik.be/httpdocs/wp-load.php:37PHP
   message: PHP 5. require_once() /var/www/vhosts/vbsdebrongooik.be/httpdocs/wp-
   config.php:78PHP message: PHP 6. do_action() /var/www/vhosts/vbsdebrongooik.be/
   httpdocs/wp-settings.php:546PHP message: PHP 7. WP_Hook->do_action() /var/www/
   vhosts/vbsdebrongooik.be/httpdocs/wp-includes/plugin.php:478PHP message: PHP 
   8. WP_Hook->apply_filters() /var/www/vhosts/vbsdebrongooik.be/httpdocs/wp-includes/
   class-wp-hook.php:311PHP message: PHP 9. Elementor\\Plugin->init() /var/www/vhosts/
   vbsdebrongooik.be/httpdocs/wp-includes/class-wp-hook.php:287PHP message: PHP 
   10. Elementor\\Plugin->init_components() /var/www/vhosts/vbsdebrongooik.be/httpdocs/
   wp-content/plugins/elementor/includes/plugin.php:531PHP message: PHP 11. Elementor\\
   Skins_Manager->__construct() /var/www/vhosts/vbsdebrongooik.be/httpdocs/wp-content/
   plugins/elementor/includes/plugin.php:602PHP message: PHP 12. require() /var/
   www/vhosts/vbsdebrongooik.be/httpdocs/wp-content/plugins/elementor/includes/managers/
   skins.php:111PHP message: PHP 13. spl_autoload_call() /var/www/vhosts/vbsdebrongooik.
   be/httpdocs/wp-content/plugins/elementor/includes/base/skin-base.php:20PHP message:
   PHP 14. Elementor\\Autoloader::autoload() /var/www/vhosts/vbsdebrongooik.be/httpdocs/
   wp-content/plugins/elementor/includes/base/skin-base.php:20PHP message: PHP 15.
   Elementor\\Autoloader::load_class() /var/www/vhosts/vbsdebrongooik.be/httpdocs/
   wp-content/plugins/elementor/includes/autoloader.php:330′, referer: [https://vbsdebrongooik.be/inschrijvingen/](https://vbsdebrongooik.be/inschrijvingen/)

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

 *  [gilt](https://wordpress.org/support/users/gilt/)
 * (@gilt)
 * [5 years, 3 months ago](https://wordpress.org/support/topic/failed-opening-required-sub-controls-stack-php/#post-14007101)
 * Dear ,
 * Thank you for contacting us and for providing information.
 * We sincerely apologize for the delayed response. We have been experiencing a 
   higher than usual volume of tickets.
 * In order to provide you with a proper solution and as a first essential troubleshooting
   step, please make sure that your website is using the latest versions of Elementor(
   3.1.1) and Elementor Pro (3.0.10) after making a backup of your website.
    Also,
   make sure your WP site meets the basic requirements recommended for Elementor.
   You can check this in your WP Dashboard > Elementor > System Info. If needed,
   you can kindly ask your hosting provider to make eventual necessary changes for
   you: [https://docs.elementor.com/article/38-requirements](https://docs.elementor.com/article/38-requirements)
 * If the issue persists, as a second step, I then recommend you to follow [this article](https://elementor.com/help/fatal-error-after-updating-or-installing-elementor-or-elementor-pro/)
   from our help center. Please make sure to perform all its troubleshooting steps
   and let me know if it helps.
 * I apologize for any inconvenience and I will be looking forward to hearing back
   from you.
 *  Thread Starter [stlecho](https://wordpress.org/support/users/stlecho/)
 * (@stlecho)
 * [5 years, 3 months ago](https://wordpress.org/support/topic/failed-opening-required-sub-controls-stack-php/#post-14007367)
 * Upgrading to v3.1.1 has solved the problem

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

The topic ‘Failed opening required sub-controls-stack.php’ is closed to new replies.

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 * 2 replies
 * 2 participants
 * Last reply from: [stlecho](https://wordpress.org/support/users/stlecho/)
 * Last activity: [5 years, 3 months ago](https://wordpress.org/support/topic/failed-opening-required-sub-controls-stack-php/#post-14007367)
 * Status: resolved