After installing Buster Lite Image I made manual install of owserver.
sudo apt install owserer
During that install I got the same error messages.
Reboot and install rex with unipi script.
Everything was installed without any error.
Raspi is up and running without any issues.
@pancirm Hi Michal,
I just tested AI1 and AI2 on our UniPi v1.1 and REXYGEN 18.104.22.16881 and everything seems to work. Do you have the possibility to test the same configuration on a different UniPi 1.1? Alternatively, could you try to reinstall the current UniPi using the instructions from here? To install Rexygen with the UniPi 1.1 driver, I used the following instructions on a fresh raspberry image: