There is a major problem with Taxonomies not showing on the backend. i have disabled every snippet that could affect MetaBox and WP Admin backend, still does not work. I had a similar issue a couple months back concerning Taxonomies (would not load and provoked critical website error).
Basically cannot edit my Group Fields anymore, this is very problematic.
OK, seems like a hard refresh worked. i have no idea why there was no access possible, it is visible in the screen recording... but now it loads fine. Mysteries of computer science.