Fix: Logger print JSON and Numbers (#5916)

* Fix: Logger print JSON and Numbers

* fix test

spec/FilesController.spec.js

@@ -65,7 +65,7 @@ describe('FilesController', () => {
         expect(log1.level).toBe('error');
 
         const log2 = logs.find(
-          x => x.message === 'Parse error: Could not store file: yolo.txt.'
+          x => x.message === 'Could not store file: yolo.txt.'
         );
         expect(log2.level).toBe('error');
         expect(log2.code).toBe(130);