As I suspected, it was because of Itunes.
I uninstalled Itunes and all previously installed Apple Drivers, then installed the ones currently recommended in this forum (studiomux 5 beta): https://zerodebug.com/server/AppleUSBDriver.zip
Problem solved!
PS. I am very happy to read that the project is still alive. Devs don’t hesitate to ask for support. We love your work!