After capturing and saving the replay, I try to load it, but I get endless loading and a bunch of errors in the logs
latest.log

Can confirm. It happens because replays are captured with krypton on server or client installed (idk, can't reproduce but have broken replay). I think it's because this change (from krypton 0.2.3 changelog):

• Added events indicating when certain events in the network pipeline happen that mods can snoop on
• As a consequence of this, the old ViaFabric hooks have been removed.

Error saying "pipeline", so this could be it.

Please look into it

I can also confirm that Krypton 0.2.3 breaks the recording (the recording works, but it cannot be opened). Now I deleted Krypton, made a small recording and was able to open it, it’s a pity that old recordings cannot be opened.