Fatal error: Uncaught Error: Non-static method tc_calendar::check_json_decode() cannot be called statically in /customers/5/0/3/kvilleharvard.se/httpd.www/wp-content/plugins/appointment-calendar/calendar/calendar_form.php:32 Stack trace: #0 {main} thrown in /customers/5/0/3/kvilleharvard.se/httpd.www/wp-content/plugins/appointment-calendar/calendar/calendar_form.php on line 32