Well, we tried to watch it last night as planned but the 4k had/has an issue, cannot stream right now, come back later was the message. Tried to older version, played just fine. Thought too many people may be streaming and crashed?
This morning, same happened. Then, I saw my note on laptop for Tivo site to use Chrome. Ok, why not try HBO Max with Chrome. It worked! So we watched it on with Chrome browser. Apparently Microsoft Edge at HBO does not work for new WW1984 4k version, it works for the ones we tried with Edge.