It was hogging port 80.

I’ve been using KISS launcher for ages. I just can’t go back to a “normal” launcher again. No more swiping through pages to find and open an app. Just type a letter or two of the app name and voila.

10/10 - Would FOSS again.

If you haven’t, I can recommend checking the ProtonDB page. Sometimes you can find great tips on there. Might be worth a shot.