Since some time now I cannot add or edit recording (the artist field does not appear, the title case buttons don’t work, the edit does not submit, etc.).
https://musicbrainz.org/recording/create and same in release editor popup.

I cannot edit artist credit either (empty form).
https://musicbrainz.org/artist/787bd363-e54c-44bb-b589-cf4498614cc2/credit/2017283/edit

Same with release groups and probably all entities that have an Artist field (except release editor that still works).