I have a Basic Fabricator that is bugged. Perhaps because I changed the recipe.
It says it has 100 items without any icon, but I cannot take anything out and the machine is not working. The log does not show any error this time.
[edit] I had a similar problem with a storage box. An item had no icon and I could not take it out. When I clicked on "Sort Inventory" multiple times (!), the icon eventually reappeared and I could grab the item.