Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class Monstroid2_CX_Loader does not have a method "store_versions" in /customers/7/7/4/afd-fraktion-kassel.de/httpd.www/wp-includes/class-wp-hook.php:324
Stack trace:
#0 /customers/7/7/4/afd-fraktion-kassel.de/httpd.www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#1 /customers/7/7/4/afd-fraktion-kassel.de/httpd.www/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#2 /customers/7/7/4/afd-fraktion-kassel.de/httpd.www/wp-settings.php(682): do_action('after_setup_the...')
#3 /customers/7/7/4/afd-fraktion-kassel.de/httpd.www/wp-config.php(141): require_once('/customers/7/7/...')
#4 /customers/7/7/4/afd-fraktion-kassel.de/httpd.www/wp-load.php(50): require_once('/customers/7/7/...')
#5 /customers/7/7/4/afd-fraktion-kassel.de/httpd.www/wp-blog-header.php(13): require_once('/customers/7/7/...')
#6 /customers/7/7/4/afd-fraktion-kassel.de/httpd.www/index.php(17): require('/customers/7/7/...')
#7 {main}
  thrown in /customers/7/7/4/afd-fraktion-kassel.de/httpd.www/wp-includes/class-wp-hook.php on line 324