Title: Fatal error Last modified: May 12, 2019 --- # Fatal error * Resolved [kevinagar](https://wordpress.org/support/users/kevinagar/) * (@kevinagar) * [7 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-3199/) * Hi I’ve recently started using this plugin but now I’m getting the following error on all posts, popups, pages etc. I’m using WordPress 5.2 with Gutenberg 5.6.1 and AAM 5.9.6.2 If I revert back to Gutenberg 5.2.0 the problem goes away. * Fatal error: Uncaught Error: Call to a member function is_block_editor() on null in /home/kevimgbl/public_html/wp-content/plugins/gutenberg/lib/widgets.php:26 Stack trace: #0 /home/kevimgbl/public_html/wp-includes/class-wp-hook.php(286): gutenberg_block_editor_admin_print_scripts(”) #1 /home/kevimgbl/public_html/wp- includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #2 /home/ kevimgbl/public_html/wp-includes/plugin.php(465): WP_Hook->do_action(Array) # 3 /home/kevimgbl/public_html/wp-content/plugins/advanced-access-manager/application/ Backend/phtml/metabox/metabox-content.phtml(14): do_action(‘admin_print_scr…’)# 4 /home/kevimgbl/public_html/wp-content/plugins/advanced-access-manager/application/ Backend/View.php(213): require_once(‘/home/kevimgbl/…’) #5 /home/kevimgbl/public_html/ wp-content/plugins/advanced-access-manager/application/Backend/View.php(112): AAM_Backend_View->loadTemplate(‘/home/kevimgbl/…’) #6 /home/kevimgbl/public_html/ wp-content/plugins/advanced-access-manager/application/Backend/Ma in /home/kevimgbl/ public_html/wp-content/plugins/gutenberg/lib/widgets.php on line 26 The site is experiencing technical difficulties. Please check your site admin email inbox for instructions. * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ffatal-error-3199%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 5 replies - 1 through 5 (of 5 total) * Plugin Author [AAM Plugin](https://wordpress.org/support/users/vasyltech/) * (@vasyltech) * [7 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-3199/#post-11522914) * [@kevinagar](https://wordpress.org/support/users/kevinagar/), * All set. You can download the release candidate from here [https://downloads.wordpress.org/plugin/advanced-access-manager.zip](https://downloads.wordpress.org/plugin/advanced-access-manager.zip) * Regards, Vasyl * Thread Starter [kevinagar](https://wordpress.org/support/users/kevinagar/) * (@kevinagar) * [7 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-3199/#post-11522987) * Thank you Vasyl for your prompt reply and solution. Installed and working, thanks again. Kevin * [redwolfmendoza](https://wordpress.org/support/users/redwolfmendoza/) * (@redwolfmendoza) * [6 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-3199/#post-11783654) * Hi Vasyl, * After updating AAM plugin, we are seeing the ‘The site is experiencing technical difficulties’ message. PHP logs show the following: * Uncaught Error: Class ‘AAM_Core_Config’ not found in /var/www/html/wp-content/ plugins/advanced-access-manager/aam.php:122 * Deleting/ReInstalling the AAM plugin (as has been suggested in several forums) is not a realistic solution for us because we have continuous integration setup on our websites (scheduled core/plugin updates). We’ve also seen this problem come back a few hours/days after deleting/reinstalling. * Can you suggest a more permanent solution? - This reply was modified 6 years, 10 months ago by [redwolfmendoza](https://wordpress.org/support/users/redwolfmendoza/). - This reply was modified 6 years, 10 months ago by [redwolfmendoza](https://wordpress.org/support/users/redwolfmendoza/). * Plugin Author [AAM Plugin](https://wordpress.org/support/users/vasyltech/) * (@vasyltech) * [6 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-3199/#post-11783796) * [@redwolfmendoza](https://wordpress.org/support/users/redwolfmendoza/), * The AAM_Core_Config is part of the AAM plugin so if everything is installed properly, you should not experience this issue. * My only recommendation is to redeploy the/wp-content/plugins/advsnced-access- msnager folder and this time include all the files that come with official AAM Zip archive that you download from this WP repo. * Keep me updated if anything. * [redwolfmendoza](https://wordpress.org/support/users/redwolfmendoza/) * (@redwolfmendoza) * [6 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-3199/#post-11793792) * Thanks for the quick reply Vasyl! AAM is now working for us (at least for the moment). I’m adding this comment in hopes that it may help others: * It seems that completely deleting and then reinstalling the AAM plugin by itself– as opposed to bundling it with other plugin updates through an automated deployment– works most of the time. We still see the error above occasionally when re-deploying, but it is difficult to reproduce in our staging environment and does not happen at all in our local dev environments. It’s possible that our continuous integration server (Bamboo) may be caching certain parts of our repo during the build phase, but I don’t know if that is even a feature. - This reply was modified 6 years, 10 months ago by [redwolfmendoza](https://wordpress.org/support/users/redwolfmendoza/). - This reply was modified 6 years, 10 months ago by [redwolfmendoza](https://wordpress.org/support/users/redwolfmendoza/). Viewing 5 replies - 1 through 5 (of 5 total) The topic ‘Fatal error’ is closed to new replies. * ![](https://ps.w.org/advanced-access-manager/assets/icon-256x256.png?rev=3447421) * [Advanced Access Manager – Access Governance for WordPress](https://wordpress.org/plugins/advanced-access-manager/) * [Support Threads](https://wordpress.org/support/plugin/advanced-access-manager/) * [Active Topics](https://wordpress.org/support/plugin/advanced-access-manager/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/advanced-access-manager/unresolved/) * [Reviews](https://wordpress.org/support/plugin/advanced-access-manager/reviews/) ## Tags * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/) * 5 replies * 3 participants * Last reply from: [redwolfmendoza](https://wordpress.org/support/users/redwolfmendoza/) * Last activity: [6 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-3199/#post-11793792) * Status: resolved