It literally says in the post you quoted that the mod doesn't work with the betashello, when you talk about the latest version you talk about the version v0.6 Beta 3 ?? if so, then it actually crashes the game
if it's not the version can you put a link to version 6.0 that works with your mod ?
The mod works with version 0.6 the latest version is Harem Hotel v0.6 Pre-Release which has not been posted here, it's is only available for download on Patreon for $20 patrons, you will have to wait for the full public release.
Or use the 0.5.3 version of the mod with Harem Hotel v0.5.3.