Brand new Pi4B installed Astroberry and configured it, setting up IOptron CEM60 (connected directly to PI4 USB with Serial converter to USB with FDTI chipset), the same cable worked great with APT 2 days before I started this project, 2 ASI cameras and Celestron Focuser. all worked except the mount. the mount appears to show that it is trying to use the Celestron Focuser driver both indicate in the Port selector box    /dev/serial/by-id/usb-Celestron_Celestron_Focuser_MF_v1-if00 . After a number of hours trying different variations on the setup, none of which worked, I upgraded the software through a Terminal command. Astroberry came back live and after reboot it ran well,  but my problem is not solved.
upon connect, the mount gets a warning saying 2021-11-18T07:47:23:[WARNING port//dev/serial/by-id/usb-Celestron_Celestron_Focuser_MF_v1-if00 is already used by another driver or process.
and does not start.

Any ideas what could be wrong?

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