Can you run these and send back the output:
ls -l /usr/bin/parecord
grep Exec /usr/share/applications/manent.desktop
/usr/bin/manent
With the third command the app starts from the terminal. If recording works from there, the problem is the launcher's environment and not the package. Also useful: with the app open, the PATH it actually has:
cat /proc/$(pgrep -n manent)/environ | tr '\0' '\n' | grep ^PATH=