diff --git a/lib/Service/ShopAccountService.php b/lib/Service/ShopAccountService.php
index 6d5f9a349aa207e8cdae4cadb6a9ae5f710b6d07..ce601ca974b4ecd1241013380b902456e01c34e3 100644
--- a/lib/Service/ShopAccountService.php
+++ b/lib/Service/ShopAccountService.php
@@ -90,6 +90,7 @@ class ShopAccountService {
 			return $users;
 		} catch (Exception $e) {
 			$this->logger->logException($e, ['app' => Application::APP_ID]);
+			return null;
 		}
 	}