Thanks for the hint with the following code:
Now JaamSim opened. Unfortunately, in a strange way. Please have a look at my video.
Operating System: Linux (version: 5.10.147-20158-g0a75306e5639)
Java: BellSoft (version: 1.8.0_352)
Loading Simulation Environment ...
Simulation Environment Loaded
View window requested: View1
Found OpenGL version: 4.5 (Core profile, arb, compat[ES2, ES3, ES31, ES32], FBO, software) - 4.5 (Core Profile) Mesa 20.3.5
Found GLSL: #version 450 core
OpenGL Major: 4 Minor: 5 IsCore:true
Renderer loop started
View window created: View1
RenderManager loop started
View window displayed: View1
Do you know what else I can do to fix that issue?
I appreciate any help you can provide.