I can't upvote any post from the discussion list with the alternative layout, it gives this console issue:
Uncaught TypeError: t.discussion is not a function
at Z (forum.js?v=e9373c2f:378:122168)
at f (forum.js?v=e9373c2f:378:133869)
at HTMLButtonElement.onclick (forum.js?v=e9373c2f:378:134238)
at L.handleEvent (forum.js?v=e9373c2f:1:153074)
I think it happened after first approving a post from a user with Approval does that make any sense?
Note that it has happened to me with two new installations, the first on Windows and the second on CentOS same problem in both running the same scenario.