Did you create any account restrictions for this user and interface? You can check by going to Admin->Account Manager, select the account with the problem and click Edit. You should see an Account Limitations section, anything there?
no account limitations...also it started working again after lunch...strange.
We are occasionally receiving exact same error (happens to different userid) - mostly ADMIN folks (no restrictions). Our web console is on a dedicated server. Running NPM 10.0
Same happening here.
After upgrading to 10.1.1 a random account (different accounts on different days) will throw this error.
I use the "additional web server" and it appears the login is only broke on this website/web server.
If I use the same login on my main SLX website, it works fine.
I'm was also struggling with this issue on full version 10.1.2 SLX NPM with Admin accounts. Stops an admin from adding nodes, viewing the poller engines status to name a couple of problems this it causes.
So, I ran the OrionPermissionChecker.exe and found that two of the locations were having issues and FAILED. I ran the repair, it didn't correct everything as it showed but by running the repair and check a couple of times it fixed the permissions.
Then I forced and the w3wp.exe service closed.
Finally, I did an iisreset from the command prompt and gave it 10 minutes.