Guide to Build an Ammo Box
You need to pull out the build tool by pressing ‘B’. Then on a valid build zone, looking more at the floor works better, you press ‘R’ to change from repair to build option of the build tool. Then use the q and e to cycle.
If this isn’t a bug then you should look more directly at the floor when building as it can have trouble understanding that you looking to build something.
thanks, holy moly is this game’s tutorial badly made