In the "ZOMBA"/MOBA of Dead Island, Dead Island Epidemic, you can craft new weapons from blueprints (just like in Dead Island). You go to the workbench, select a blueprint, and if you have the required materials, you can craft a new weapon - which then shows up in your inventory.
But you can click all you like in the inventory, right, left, keyboard - you cannot equip it to your characters. Nor can you from the character screen by clicking on the weapon icons.
So, how does one equip crafted weapons in Dead Island Epidemic?