@PhoneBoy is corect. Try new build os smart console, not a bad idea. Personally, besides that, I would attempt below.
-uninstall/reinstall smart console and test
-if above fails, cpstop/cpstart on mgmt server
-if that fails, then maybe try rebooting
-if reboot fails to solve the problem, then there is something more serious going on that may require TAC assistance.
Honestly, its possible that something may have gotten corrupted on your server. When did this start happening?
Best,
Andy
"Have a great day and if its not, change it"