On my E2:
Just tried Star Trek - Picard S03E02 and first click it stalled and then bailed me back to info screen. Second time I clicked on it, it started, played for 3 seconds and hung for about 10 second, then played 1 or 2 seconds, and hung again.
Movies, I quickly tried "No time to die" and The Batman, and they don't start.
On my 4900:
Movies (same ones) do the same.
Series is strange. Click on the series and you get the description page, but no "seasons" tabs/buttons to select a season and episode.
Also tried maverick-4k and seems to start and got 5 seconds (of the 2h10m) and then it hung. Tried the non 4k and it did not start.
Guess it may be a work in progress, or some other glitch.