Datapack Validation Failed, MCreator 2023.1

I've updated to the official release of MCreator 2023.1 today, and rebuilt my project, but every time I now try to generate or load a world with the datapack containing the mod's generation resourced, I get the message "Datapack Generation Failed" in-game.
Everything has worked perfectly in the official 2022.3 release, and the only thing I did was update.
My guess is that it has to do with structures and biomes, because all the overworld biomes I made that were not set to generate in caves did not place anything over the surface, and none of the structures generated.

Will add a log in a comment.
For the time being, I am going to revert back to 2022.3.