Problem starting gmoccapy

Hello everyone, i am Panos from Greece. I am new at linux in general and ofc i have some problems.

I have raspberry pi4 and install buster version with openbox, linuxcnc and real time kernel. I think that all good with that.
Linux raspberrypi 4.19.71-rt24-v7l+ #1 SMP PREEMPT RT Fri Jun 12 00:29:41 EEST 2020 armv7l

AXIS gui run ok but if i change to gmpccapy i have the errors as in screenshots and in txt file i have the terminal output.

I like more this gui and i would love to use it with my plasma, if is possible.

If you need more info about something i will be happy to provide it..

If you can guide me to the right direction to solve it i will be appreciate it, thanks a lot.

I find it out finally, the problem was that i didn't have a "desktop environment". I install one and open right away..

I use