Fatal error: Uncaught Error: [] operator not supported for strings in /www/htdocs/w013738d/websites/wurfteam-potsdam.de/wp-content/plugins/calendarize-it/includes/class.calendar_ajax.php:542 Stack trace: #0 /www/htdocs/w013738d/websites/wurfteam-potsdam.de/wp-content/plugins/calendarize-it/includes/class.calendar_ajax.php(307): calendar_ajax->_get_calendar_items(false, Array) #1 /www/htdocs/w013738d/websites/wurfteam-potsdam.de/wp-content/plugins/calendarize-it/includes/class.shortcode_calendarize.php(185): calendar_ajax->get_calendar_events(Array, 'json', true) #2 /www/htdocs/w013738d/websites/wurfteam-potsdam.de/wp-content/plugins/calendarize-it/includes/class.shortcode_calendarize.php(155): shortcode_calendarize->handle_preloaded_events(Array) #3 /www/htdocs/w013738d/websites/wurfteam-potsdam.de/wp-includes/shortcodes.php(345): shortcode_calendarize->calendarize(Array, '', 'calendarize') #4 [internal function]: do_shortcode_tag(Array) #5 /www/htdocs/w013738d/websites/wurfteam-potsdam.de/wp-includes/shortcodes.php(223): in /www/htdocs/w013738d/websites/wurfteam-potsdam.de/wp-content/plugins/calendarize-it/includes/class.calendar_ajax.php on line 542