When navigating to Space usage window, this error shows:
ERROR [42884] [IBM][DB2/LINUX] SQL0440N No authorized routine named
"SNAPSHOT_TBS_CFG" of the "FUNCTION" having compatible arguments was found.
IBM DB2 10.5.x.x is not supported yet. This will be supported in Toad for DB2 5.6.
Check the release notes for system requirements.