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That did the trick. Did see that solution while googling, but there it was that it works once, and then fails. Since it always failed in my case, didn't try...

Possible, but for now not looking forward to creating and supporting yet another mod. Maybe sometime later/when it gets fully removed from the mod.

With 7zip you can open the zip, but one of the model files in it is corrupted(fails to unzip correctly) and there seems to be a bunch of files missing(only...

I cant really say anything to this. During walking the model slightly bobs left and right as part of the animation. Never seen or heard of the falling thing, but...

Please verify with the 1.6.0 version. Also then add the crash log here.

What?

Then you have some mod messing with stuff. This mod doesn't touch the camera at all and from the player model only the x and z, never the y.

Figure out which mod is causing this and remove it/report the issue at that mods bug tracker/tell me here which one it is so I may look into it.

Yea probably. Possible that recent changes broke the compatibility if they used the incorrect apis.

This will affect 1.16.5-1.20.4.