The post before mine already pointed this out so I’m only reinforcing the fact that it’s not isolated to his situation. You cannot save an Import. Even if you go back to one you’ve successfully saved and and make NO changes, but simply hit the save button you get:
Please correct the following error:
Field “language”: This field is required.
Even though it already was or is - (sometimes though the chosen “Italian” reverts to English in the drop-down list). Also, the drop-down is grayed out - you simply cannot select any language at all. Something’s broken ;).
Daniel Léo Simpson