Wooden Doorway build problem

I recently tried to build wooden doorway, and there is not green “illusion” and i cant see if i can build it in any way. My friend have the same issue, any ideas?

Do you have your pillars placed on either side ?

Yea, but even if i hadnt, then you simply should see red “ilussion”

That happens to me sometimes, walls and things too on occasion. I usually just pull something else out for a moment then try switching back to the door frame. Sometimes switching it to a different number slot works too. If those don’t work, refresh your browser and it should work for you.