GC on Rasberry Pi 4B 4GB

just received our Rasberry Pi 4B uprade. inserted the SD card from the old Rasberry Pi 3 and tried to start GC … no luck, no joy … it’s not starting!

Does anybody know how to get that fixed?
On another subject, why GC for Linux is Version 1.28, whilst PC/Mac is 1.26?

If you want to use a RPi, I suggest you install WebControl instead of GroundControl

Includes Holey Calibration which is a huge improvement in my opinion