Thanks, that was easy and at least solved this error. I now get this error
But this is probably because spi is not working properly. When I enter ls /dev/spi* , I get ls: cannot access '/dev/spi*': No such file or directory
However, my /boot/armbianEnv.txt Config is set up with
overlays=spi-spidev
param_spidev_spi_bus=0
according to other posts on the Internet. If you have any ideas, please feel free to contact me again. Now that the problem only affects Armbian, I don’t think I’ll get any further here. I will have to debug it myself and find the reason. Thanks for the help 