GUI won't run

Hey, I have the lego dimensions toypad here at home and wanted to experiment with it. After some searching I found your website, https://www.dajlab.org/jtoypad.html and followed the instructions. But when I tried to run the GUI, It wouldn't start. Can you help fixing it?

Im using java version "1.8.0_281" and runtime environment build 1.8.0_281-b09 on windows 10.

Can you help?
JasperDG828