Fatal error: Uncaught TypeError: Collaboration::existsForPerson(): Argument #2 ($personId) must be of type int, null given, called in /home_old/quanti/public_html/team/team-details.php on line 15 and defined in /home_old/quanti/public_html/classes/Collaboration.php:151 Stack trace: #0 /home_old/quanti/public_html/team/team-details.php(15): Collaboration->existsForPerson(27, NULL) #1 {main} thrown in /home_old/quanti/public_html/classes/Collaboration.php on line 151