On off shim no longer works

I use an on off shim on a Raspberry. For some time and some updates, switching off with a longer press no longer works. Is it possible that the script doesn’t work anymore?

Redo / rerun the installer (if you haven’t already) and see if it gets working again.

I’ve done that a few times, but it didn’t help

Ok, I don’t own one so I don’t know what to try next?