[Worker-ResourceReload-9/ERROR] [patchouli/]: Failed to load book babyfat:the_book_of_baby_fat defined by mod babyfat, skipping
java.lang.IllegalArgumentException: Book babyfat:the_book_of_baby_fat has use_resource_pack set to false. This behaviour was removed in 1.20. The book author should enable this flag and move all book contents clientside to /assets/, leaving the book.json in /data/.