Opening .jar files with `pkexec` and using Desktop Entries to run commands

I am writing a bash script that automates installation of TLauncher (Minecraft launcher) and basic dependency management on USBs running Lubuntu 18.04. Part of the bash script creates a desktop entry under /usr/share/applications for easy launch from the Lubuntu menu. Here is the entry I am using: [Desktop Entry] Encoding=UTF-8 Exec=pkexec env DISPLAY=$DISPLAY XAUTHORITY=$XAUTHORITY /usr/bin/java -jar -Dswing.systemlaf=javax.swing.plaf.nimbus.NimbusLookAndFeel ~/.minecraft/tlauncher.jar Icon=~/.minecraft/icons/default.png Type=Application Terminal=false Name=Minecraft GenericName=minecraft StartupNotify=false Categories=Game The command pkexec env DISPLAY=$DISPLAY XAUTHORITY=$XAUTHORITY /usr/bin/java -jar -Dswing.systemlaf=javax.swing.plaf.nimbus.NimbusLookAndFeel ~/.minecraft/tlauncher.jar works and does launch TLauncher if run in the terminal. However, I feel I am missing something when I put the command in the Desktop Entry. When I try to open the entry from the Lubuntu menu, the cursor shows that something is loading, but then nothing happens no matter how long I wait. I am also not sure how to debug the Desktop entry. I tried toxdg-open the entry, but I got no output in the terminal and nothing happened either -i.e, TLauncher did not launch. I tried putting the command in a separate bash file that looks like: #!/bin/bash pkexec env DISPLAY=:0 XAUTHORITY=/home/me/.Xauthority /usr/bin/java -jar -Dswing.systemlaf=javax.swing.plaf.nimbus.NimbusLookAndFeel ~/.minecraft/tlauncher.jar Running that in the terminal bash testscript.sh works and does launch TLauncher. But when I put it in the desktop entry replacing the exec from the entry above like so: Exec=/bin/bash /path/to/testscript.sh It does not work. The shell scripts have the proper permissions. I feel like either I'm writing the Desktop Entry's exec value wrong or that pkexec isn't supposed to work from a Desktop Entry the way I am trying to make it work. I would like to be able to launch TLauncher from a desktop entry via the menu and have a gui popup asking for the password in order to have the command run as root. **Edit:** Using full paths instead of ~ also yields the same result -i.e, it does not work and the above issues remain. Setting Terminal=true does not solve this for me.