LODs won't load

I'm playing the Valhelsia 6 modpack (Forge 1.20.1) atm and wanted to add DH. I found out that the game usually crashed but with the RC version from the #announcements channel it actually starts. But now the problem is that the LODs aren't generating at all. I already tried enabling the blue and red boxes but there aren't any. Hope someone can help.

thx