Crash when adding a keyframe in MC 1.14.3 about replaymod HOT 5 CLOSED

I see two issues here.

The first one is the failure to load the entity tracker (i.e. the RM failed to parse parts of the replay for itself). If the QuickCarpet mod doesn't do anything significant to the protocol, then it shouldn't matter (have you tried to just remove it?).
The actual error report for the failed entity tracker should be in the log files.

The other error is the crash of the game when using keyframes after entity tracker failure (this should be possible since 2.2.0-b2 or -b3, don't remember). The details you provided for that should be sufficient to fix it, someone's just going to have to do it (I might take a look on the weekend).

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Thanks John! I've taken a look in the logs and found this, I think it shows the entity tracking issue:

I hope that's helpful. Thanks again for all your hard work, ReplyMod is absolutely amazing! <3

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Yes, that explains the issue.

And I was wrong, that carpet mod is relevant but really any mod which adds custom entities will do. Spawning custom entities was special cased in the protocol under forge (for whatever reason) but under fabric one simply uses the same mechanism as vanilla and that trips up the RM because the library it uses to parse the packet only expects vanilla entity types to exit.

Adding support for modded entity types to it (at least to the extend which RM requires them) should be fairly simply, I'll probably do it whenever I get to the other issue.

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This should be fixed as of 2.2.0-b5.
I don't remember whether I verified that the fix actually resolves the issue, so if you try it, please report back on whether it worked.

For future reference: ReplayMod/MCProtocolLib@f8a0c71

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Thanks @Johni0702, just tested it and it works like a charm, brilliant! Thanks so much, this mod is amazing! <3

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