I am new to this project. The project was developed in 2015 using Raspberry pi2 and a 7' touch display. The disk image works perfectly on Raspberry pi 2. I tried to flash the disk image to an SD card and load it to the latest raspberry pi4. But It is not showing anything on the display. If I load Rasbian OS to the pi4, it works.
Are there any changes or updates needed when we switch to the latest version? The programs are all done using Kivy I guess(Python).