While UBL has removed the plugin requirement I will leave it in Fate if you still wish to use it.
WorldBackupSystem - BETA (This makes it so it does not generate a world but pulls the same one from a folder each game) Tutorial: https://fateuhc.bghddevelopment.com/custom-worlds-no-generation
Rare issue caused by missing dependency.
Add this to the uhcconfiguration.yml
#This will pull the world from the backUp folder in /plugins/FateUHC/backUp#It will disable generation.USEWORLDBACKUPSYSTEM: false
Please create a backUp folder within your /plugins/FateUHC folder