SYNC with QNAP NAS

I used to be able to sync Box with my QNAP TS-119 NAS.

Now for some reason it keeps failing with error:

"Cloud Storage authentication failed."

I tried to re-establish authentication, thinking maybe I forgot password or login and had changed it or something.

But I can log in, upload/download files on the web fine with the same credentials.

Has something changed with Box that QNAS authentication is not aware of?