Fatal error: Uncaught Error: Class "ActionScheduler_DataController" not found in /customers/c/5/4/fch.se/httpd.www/wp-content/plugins/my-calendar/action-scheduler/classes/abstracts/ActionScheduler.php:143
Stack trace:
#0 /customers/c/5/4/fch.se/httpd.www/wp-content/plugins/my-calendar/action-scheduler/action-scheduler.php(58): ActionScheduler::init('/customers/c/5/...')
#1 /customers/c/5/4/fch.se/httpd.www/wp-content/plugins/my-calendar/action-scheduler/classes/ActionScheduler_Versions.php(59): action_scheduler_initialize_3_dot_6_dot_4()
#2 /customers/c/5/4/fch.se/httpd.www/wp-includes/class-wp-hook.php(322): ActionScheduler_Versions::initialize_latest_version()
#3 /customers/c/5/4/fch.se/httpd.www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#4 /customers/c/5/4/fch.se/httpd.www/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#5 /customers/c/5/4/fch.se/httpd.www/wp-settings.php(550): do_action('plugins_loaded')
#6 /customers/c/5/4/fch.se/httpd.www/wp-config.php(67): require_once('/customers/c/5/...')
#7 /customers/c/5/4/fch.se/httpd.www/wp-load.php(50): require_once('/customers/c/5/...')
#8 /customers/c/5/4/fch.se/httpd.www/wp-blog-header.php(13): require_once('/customers/c/5/...')
#9 /customers/c/5/4/fch.se/httpd.www/index.php(17): require('/customers/c/5/...')
#10 {main}
  thrown in /customers/c/5/4/fch.se/httpd.www/wp-content/plugins/my-calendar/action-scheduler/classes/abstracts/ActionScheduler.php on line 143