Yes it is due to the extension no longer properly setting the defaults for items.
You can make the items if you fill in all applicable fields. Even if the item would not need the field due to a it being non magical or made out of normal material or there is no change in size all visible fields must have something selected in them.
So in short if your items is non magical it needs to have none selected in the bonus option
if the item is not made out of a special material that field needs to have none in it.
and the size field must have the size of the item even if it does not change

