I added mint tools to Sparkylinux JWM edition
and found that they do start but don't ask for authentication and they just give me a "authentication failure" message.
I added these lines to jwmrc.xml
<Program label="USB Image Writer" confirm="false">/usr/bin/mintstick -m iso</Program>
<Program label="USB Stick Formatter" confirm="false">/usr/bin/mintstick -m format</Program>
and the same problem repeats.
Should I create a script or two?
If I use RUN option and tick root option it works.
Check do you have installed 'lxpolkit' package.
If not - install it. I think it's missing.