API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid OAuth token. The provided token was not found or is malformed."}}

Hi there,

As many have reported so far, I'm also getting:

API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid OAuth token. The provided token was not found or is malformed."}}

And already tried:
/logout
/login
reinstalling
removing config.json file, etc.

Has anyone been able to fix it?