After getting my Entity to save (i put all my default values back in the text fields but left out the " characters), I created an app based on the entity.
After filling out the EditForm, i get an helpful error (see Subject).
I wish i could be more specific, but then it wouldn't be an unknown error.
Am I just out of luck? Or do I have to start over with a new form checking one field at a time and adding fields until the form that fails?