diff --git a/public/static/js/game.js b/public/static/js/game.js
index e302a86..789ba2c 100644
--- a/public/static/js/game.js
+++ b/public/static/js/game.js
@@ -135,7 +135,7 @@
                 Core.resetGame();
             };
 
-            xhr.open('GET', '/game/' + mapId + '/position.json', true);
+            xhr.open('GET', '/game/' + mapId + '/json', true);
             xhr.send();
         },
 
diff --git a/src/Controller/PositionController.php b/src/Controller/PositionController.php
index c8fa35a..1564730 100644
--- a/src/Controller/PositionController.php
+++ b/src/Controller/PositionController.php
@@ -22,7 +22,7 @@ class PositionController
         $mapId = (int) $parameters['mapId'];
 
         if (!isset($_SESSION['state']) || $_SESSION['state']['mapId'] !== $mapId) {
-            $data = ['error' => 'No valid session found!'];
+            $data = ['error' => 'no_session_found'];
             return new JsonContent($data);
         }
 
@@ -60,7 +60,7 @@ class PositionController
         $mapId = (int) $parameters['mapId'];
 
         if (!isset($_SESSION['state']) || $_SESSION['state']['mapId'] !== $mapId) {
-            $data = ['error' => 'No valid session found!'];
+            $data = ['error' => 'no_session_found'];
             return new JsonContent($data);
         }