As many are aware, (or directly ran into by now), an ongoing issue since the #hackcheck_queue form was updated for SWSH has been that many alternate/regional forms don't allow the selection of the correct moves or abilities.
Instead, they typically only allow the selection of abilities and movesets that are legal for the "base" form of that species.
-# Currently the only "workaround" is to fill out the form with incorrect abilities and moves, then manually correct them by hand in the text output before submitting it, which is tedious and not ideal.
My suggestion to resolve this issue is simple:
Allow every ability and every move to be selected for every species and every alternate form, rather than trying to limit it to only legal abilities, and legal moves within the learnset of that species.
This would solve the above error, as well as allowing players to submit illegal moves or abilities (if they somehow obtain a Pokemon with an impossible move/ability), and in the case of SWSH submissions, it would also allow them to submit various event-exclusive moves that fall outside of the typical learnset for that species.
