Parsing Errors - desktop files fail parsing / not found in PATH

[edwardc]

Message is titled Parsing Errors. Text starts "The following desktop files have failed by the underlying library and will therefore not show up in MenuLibre.

Two of them. The first is
    /usr/share/applications/kde4kde4/knetattatch.desktop
    Exec program 'knetattach' has not been found in the PATH

Same msg for luckybackup-gome-su.desktop but with prefix
    su-to-root -x -c

System is pretty vanilla. Clean install of Mint 19.2 with a large number of applications added after updating the system.

No idea how to "investigate these problems" as recommended. If instructions can be given, that would suffice as a patch.

Thanks.

P.S. I personally prefer the old-fashioned way of changing the menu as it gave me more control. One example: I've now got items under Applications that does not show up in the MenuEditor so I can't get rid of them.