Maybe there are several errors coming together. But at least I was now able to reproduce one error.
When I install the included Python Scripting, everything works perfectly.
When I install Python Scripting Next from the Marketplace or via the addons folder, it automatically uninstalls after a short time.
The strange thing is that this only happens on my test system.
It works on my production system. The difference here is that I didn’t install the binding via the web interface or just moved the kar file to the addons folder.
Instead, I moved the kar file to the addons folder and additionally I also added the following configuration to the conf/services/addons.cfg file:
automation = jsscripting,pythonscripting
To avoid spamming this thread, I created a follow up thread for this strange behavior.