Still not working for me on WP5.8.1

Linked the original thread for another user’s issue but branched off into my own.

Can you indicate what changed to patch it for them? I have the latest update and yet I can’t see columns, can’t quick edit and can’t bulk edit and it was *so nice* while it lasted.

I checked the changelog but didn’t see mention of what the latest update resolved that seemed related.

Is there any particular spot in the code I could mess with to get it going for me?

The page I need help with: [log in to see the link]