Sorry, it still didn't come out fully, it's a severity 1 message, i.e. Error and read:
"Unexpected empty path of Patch Install Tools Package package."
This suggests to me that your Patch Management plug-in install hasn't run correctly - it's actually more than one install. If you look at the Symantec Management Agent and select "Show expired..." and "Show internal..." you should see a "Patch Install Tools" package. Open it and see if you can see any clues as to why it's showing an error.
On my PCs it's grey, shows as "Disabled" in the Summary tab, the Details tab shows the GUID they should be found under but doesn't have a command line, the Download Histroy tab shows the history but no Source location anymore and the Run History tab doesn't show anything.