LT Won't equip ammo, says already equiped
I tried a few things to get it to work such as starting it with arrows equiped, letting it fletch more + a few more things.

I still can't get it to work.
If you need more info, let me know what i need to provide.

If this is the same as a previous problem I had check your "Items" tab and make sure there isn't a damage type checked and then there is no weapon selected for that type. A quick check would be to uncheck everything on the "Items" tab, save, and see if that fixes it.