Pretty early in the game, but there are a number of buildings that doors don't seem to work. So I'm currently at one of the triangular buildings with a front door that doesn't open. There are no obvious entrances through the ceiling or through the wall into these buildings. Is this intentional? Or am I missing some obvious way into the structure? I've found other buildings that have holes in the ceiling or such and then inside the doors are barred. In this case, I went all over the building and didn't find an entrance. So why is the golden token showing up inside a building I cannot enter?

@thw-ger Thank you! My middle button was reconfigured, so I reset it back to middle button and it worked.

I have a weapon rune in my bag and I have a weapon with a rune slot. When I go into my inventory under my main hand weapon, it has a little mouse icon (left button) for equip|unequip and then it has another little mouse icon with no indicators as far as I can tell for rune. I right click and it tries to upgrade my weapon, I use the center wheel and center button which don't seem to do anything. There doesn't seem to be much UI assistance to explain how this works.