Have you tried to extract it for example on some main drive like D:/ does it show the same error?
The incest patch means there are reworked texts that changes reference to characters, some texts were cut out , some were added, it works with english only, also this is a fan made mode for the game. I don't know much details but you can ask it's authors for more info.
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That seems to have worked for me for now. I downloaded it into a separate drive and extracted it there, then I copied the files over to where I tried first and deleted the originals and the animations are working properly now. Thanks for the help. I kinda feel dumb that I didn't think to do that in the first place.