cannot use pkexec

[Patrick]

That might not have worked since lxsudo itself is just a symlink to lxqt-sudo.

@Patrick_mobile

Try delete the symlink and use pkexec being a wrapper script calling lxsudo instead.

Instructions:

sudo unlink /usr/bin/pkexec
sudo rm /usr/bin/pkexec
sudoedit /usr/bin/pkexec

contents of wrapper /usr/bin/pkexec:

#!/bin/bash
/usr/bin/lxqt-sudo "$@"

Save.

Make executable.

sudo chmod +x /usr/bin/pkexec

Try.