Hi @AndZAndZ , do you mind sharing what version of libreelec are you using? The new instruction in the PDF have subtle difference from our previous version. Just want to make sure that what you follow is the new version. There is a portion that you need to reboot the unit before proceeding with the installation, it is an important step.
I would recommend uninstalling your previous installed driver and do it again. We have make some updates to our original script to make the remote work with the latest version of libreelec.
Let us know how it goes.