update

js/Common/uploadR2R.js

@@ -24,6 +24,7 @@ window.uploadFile = async function ({ file, uuid, userid, folderid, moFolderid }
       method: 'POST',
       body: formData,
       headers: {
+        'Accept': 'application/json',
         'Content-Type': 'application/json'
       }
     });