Fatal error: Uncaught Error: Attempt to assign property "references" on null in /var/www/html/impel.eu/core/pages/ProjectDetail.php:57 Stack trace: #0 /var/www/html/impel.eu/core/pages/ProjectDetailActivities.php(19): app\pages\ProjectDetail->loadData() #1 /var/www/html/impel.eu/core/pages/ProjectDetail.php(17): app\pages\ProjectDetailActivities->loadData() #2 /var/www/html/impel.eu/core/pages/ProjectDetailActivities.php(14): app\pages\ProjectDetail->__construct() #3 /var/www/html/impel.eu/core/main/Route.php(211): app\pages\ProjectDetailActivities->__construct() #4 /var/www/html/impel.eu/index.php(26): app\main\Route->getPageClass() #5 {main} thrown in /var/www/html/impel.eu/core/pages/ProjectDetail.php on line 57