diff --git a/lib/BackgroundJob/Tasks/CheckRequirementsTask.php b/lib/BackgroundJob/Tasks/CheckRequirementsTask.php
index 496fa7f4..cdd048da 100644
--- a/lib/BackgroundJob/Tasks/CheckRequirementsTask.php
+++ b/lib/BackgroundJob/Tasks/CheckRequirementsTask.php
@@ -158,6 +158,7 @@ public function execute(FaceRecognitionContext $context) {
 			return false;
 		}
 
+		$model->open();
 		$maxImageArea = $model->getMaximumArea();
 		if ($imageArea > $maxImageArea) {
 			$error_message =