Workbench Error: No role exists for id


I encountered unusual situation; can’t log in to Workbench. The error I get is “No role exists for id: xx-yyy-zzz”. Funnily enough, I can log in to Content Explorer and Server Admin with the same account. Tried other accounts (both ldap and database), from different hosts but no luck.

Where is that ID pointing to?

Needless to say, many thanks in advance.