fix exeption handling

@@ -536,7 +536,7 @@ abstract class ImmoScoutAPI extends GuzzleClient
     {
     {
         try {
         try {
             return json_decode((string) $res->getBody(), true);
             return json_decode((string) $res->getBody(), true);
-        } catch (Exception $ex) {
+        } catch (\Exception $ex) {
             throw new InvalidResponse('invalid json response');
             throw new InvalidResponse('invalid json response');
         }
         }
     }
     }