Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, bool given in /homepages/44/d260345546/htdocs/radsport-events/Termine-Radmarathon-Brevet-RTF-Breitensport/kalender.php:20 Stack trace: #0 /homepages/44/d260345546/htdocs/radsport-events/Termine-Radmarathon-Brevet-RTF-Breitensport/kalender.php(20): implode('', false) #1 {main} thrown in /homepages/44/d260345546/htdocs/radsport-events/Termine-Radmarathon-Brevet-RTF-Breitensport/kalender.php on line 20