I don't really know where best to turn to, so I decided to post my problem here.
I installed Parabola GNU/Linux OS with LXQt as DE.
Everything works fine, except PCManFM isn't showing folder icons.
https://snag.gy/xuKHq5.jpg
Icons theme is Adwaita.
Changing it to Oxygen, the only other Icons theme I've downloaded only makes matters worse, with several more icons missing.