Fatal error: Uncaught exception Error with message Function name must be a string thrown in system/modules/calendar_extended/classes/EventsExt.php on line 536
#0 system/modules/calendar_extended/modules/ModuleCalendar.php(256): Contao\EventsExt->getAllEventsExt(Array, 1525125600, 1527803999, Array)
#1 system/modules/calendar_extended/modules/ModuleCalendar.php(199): Contao\ModuleCalendar->compileWeeks()
#2 system/modules/calendar_extended/modules/ModuleEventMenu.php(68): Contao\ModuleCalendar->compile()
#3 system/modules/core/modules/Module.php(287): Contao\ModuleEventMenu->compile()
#4 system/modules/calendar_extended/modules/ModuleCalendar.php(119): Contao\Module->generate()
#5 system/modules/calendar_extended/modules/ModuleEventMenu.php(47): Contao\ModuleCalendar->generate()
#6 system/modules/core/library/Contao/Controller.php(321): Contao\ModuleEventMenu->generate()
#7 system/modules/core/pages/PageRegular.php(133): Contao\Controller::getFrontendModule(Object(Contao\ModuleModel), 'left')
#8 system/modules/core/controllers/FrontendIndex.php(285): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#9 index.php(20): Contao\FrontendIndex->run()
#10 {main}