Hi Guys
After deleted some unmanaged nodes and logging out of SAM, went to log back in and receive the below;

We have 1 DB SW server with 2 Pollers, and a Front End Web Server. The above message is received when web browsing out via the Frontend Web Server, I can login by changing the IP address to one of the Pollers in the URL.
I have logged onto the Front End, restarted all SW services, ensured that SW services are running on all servers, reset IIS and Application Pools on the Front End, then bounced the Frond End, but still receive the above when logging into SAM!
Is this going to be a case of running a Repair on Config Wizard, or something like that?