Cannot open display: use "guitarix -h" to get a help text fatal system error: Guitarix Commandline Option Error *** Cannot open display: use "guitarix -h" to get a help text

Usage: guitarix [OPTION?] All parameters are optional. Examples: guitarix guitarix -r gx4-black -i system:capture_3 guitarix -c -o system:playback_1 -o system:playback_2 Help Options: -h, --help Show help options --help-all Show all help options --help-style GTK style configuration options --help-jack JACK configuration options --help-overload Switch to bypass mode on overload condition --help-file File options --help-debug Debug options --help-gtk Show GTK+ Options Application Options: -v, --version Print version string and exit -N, --nogui start without GUI -p, --rpcport=PORT start a JSON-RPC server listening on port PORT -H, --rpchost=HOSTNAME set hostname to connect to -G, --onlygui start only GUI -L, --liveplaygui start with Live Play GUI -M, --mute start with engine muted -b, --bank=BANK:PRESET (A:0-Z:9) set bank and preset to load at startup -t, --tuner_tet=tuner temperament (12, 19, 24, 31, 53) set tuner temperament at startup -F, --reference_pitch=tuner reference pitch (225 - 453) set tuner reference pitch at startup --display=DISPLAY X display to use