LED Case for Raspi Pi4

Hey folks, I have a question. Maybe some people are here who are know umbrel os very much.

I have a LED Case for my Umbrel Raspi Pi 4, and before I updated to Umbrel 1.0 I was able to start Shell scripts (.sh). But now I copied again my .sh to my SD card and when I try to start it, it says no python. But when I check it, python 3.8 is installed.
Do somebody know whats going on and how to start a shell script?

Maybe there is one person who also have a LED case connected to GPIO.

Thanks for your help!