For those of you having problems getting this to unlock, I was in the same boat but eventually got it to unlock.
What I ended up doing was going through the "Survivor" journey as if I was playing the game normally. I still had Admin controls but really didn't need them for this. Half way through the journey, your task is to "Harvest Stone with your Stone Pick". Once you've done this step, the next step is "Craft a Stone Weapon". I chose to craft a Stone Spear, I did have to pick up a few more branches from around the area but there was plenty of them. Once I'd crafted it, I selected it from my weapon wheel and the achievement unlocked instantly.
I had to do the same thing for the achievement you get for crafting a building. I'm wondering if the game expects you to be at a certain point when these unlock.