keyboard case charging but not typing

[new2pinephone]

I loved the idea of the keyboard case, but can't get it to type. I have tried most suggestions in https://xnux.eu/pinephone-keyboard/faq.html
 
The fact that it charges the phone makes me believe that the pins are connecting, but there is no typing happening. 
I tried pressing a bit where the pins are, but no difference. Before I try raising the pins on the case, could there be other explanations?

I am running Manjaro KDE Plasma 5.22.4, which I believe should be compatible. If not, how do I get the driver?
I am an enthusiast but not a strong developer, so step-by step commands to use would be immensely appreciated.

Thanks in advance!