I have it working. I spent quite some time debugging the old build, and adopting the code to python3.
The framework “tk-framework-adobe-ppro” also should be updated including rebuilding Adobe CEP.
And finally, one more problem appeared, when you’re able to only run any toolkit application in premier or ae once. After that, it stops responding. Basically what happens is that the event server stops. Now I have to force it to start back again by injecting in every app hook before doing anything.
engine._HEARTBEAT_DISABLED = False
Otherwise both premier and ae stop being able to run any app.
Hope that helps anyone.