I’m also facing the same problem with N1ql queries now. Weird thing is that it was working fine till the last restart of the server and suddenly it started throwing this error.
I’m launching cbq tool with this param : -engine="http://user:password@host:8093/
N1ql query throws an error that the keyspace not found. If I remove the authentication, it works fine. But what do I do get it working again with authentication?