Open alpha testing of the 5.0 HD mod (online lobby).

I'd like to add to the question. It seems that no battle saves load at all (the game crashes every time I try to load any battle save).
The HD version is the latest (5.0 beta 49). Hw_rules 1.38 or 1.40 doesn't change anything.
I sent a sample of such a battle save via private message.
Previously, everything worked fine. This problem started with a relatively recent patch.

Added after 4 hours 10 minutes
Additional problem: after updating the launcher, all old saves stopped loading. The same crash occurs as with the battle save.
That is, all saves made in the games before the update now do not load.