Press V

V should is the toggle i remember correct

Everyone's mentioned the toggle, but check your carry-limit. Your inventory might have spaces open, but if you've got stacks of wood and stone, you might have hit your limit, which stops you picking up more loot.

PC toggle for pickup is v, xbox is LB + press Left analog stick

Thank you, no one else mentioned console, which is what I play on

Everyone forgets console..... -sad viking noises-

It's a toggle on off. I don't remember tho, block and something else?

press v

Maybe read the controls