I was doing some maint. and deleting some custom properties that I no longer had in use. After this process I went back to my main NPM page summary which had an ALL GROUPS view sorted by Root Group which displayed some parent groups. App1 Health, App2 Health and child groups under need App1 Nodes, App1 Volumes, etc. If I go under SAM and click Applications > Summary I still see the child nodes however I can't access Groups. When I click Setting > Manage Group I get the attached error:
Error: A query to the Solarwinds Information Service failed.
After I click ok it loads but no way to see any groups, even the child groups I see in SAM.