Fatal error: Uncaught TypeError: Argument 1 passed to SlampDesk\Admin\DocumentManager::getRelativeFilePath() must be an instance of SlampDesk\Admin\Folder, bool given, called in /var/www/vhosts/isolino.it/httpdocs/controllers/download.php on line 11 and defined in /var/www/vhosts/isolino.it/httpdocs/slampdesk/classes/Admin/DocumentManager.php:150 Stack trace: #0 /var/www/vhosts/isolino.it/httpdocs/controllers/download.php(11): SlampDesk\Admin\DocumentManager->getRelativeFilePath(false) #1 /var/www/vhosts/isolino.it/httpdocs/default.php(145): require_once('/var/www/vhosts...') #2 {main} thrown in /var/www/vhosts/isolino.it/httpdocs/slampdesk/classes/Admin/DocumentManager.php on line 150