MVB Error "Upload Failed - Cannot get session token"

Has anyone else experenced the error "Upload Failed - Cannot get session token"? If so, do you know how I could get this fixed? It just suddenly started and it appears to be happening for all the videos.

I even tried logging in through IE and was able to upload fine (without using MVB).

Any suggestions?

Delete all cache and cookies. This should cure it.

I tried that but didn't work Any other suggestions?

The developer sodevrom is member here, contact with him.