Reading reviews and after trying to upvote, the whole Discover crashed first of all (!) and then after launching the store again and browsing where left only gives:
“Error while submitting usefulness: Error transferring https://odrs.gnome.org/1.0/reviews/api/upvote - server replied:”
(there is nothing after the server replied). Also the attempted automatic bug report sending failed. There was a retry button that didn’t solve anything even after many many clicks.