Why cannot I use empty slots in the Workshop Factory? Plinga Support // Spil Games 16 November 2022 10:22 Updated Workshop Factory is a place to store workshops. Items are crafted in workshops. The empty slots cannot be used to craft items because there is no workshop stored there. Therefore, please store one workshop on the empty slot first if you want to use that slot to craft items. :) Related articles How do I use the Machine Factory How to use/get the Museum? How do I use the Speed Feed? About Botanic Shed How do I use the Flower House Comments 0 comments Article is closed for comments.