I created my world in 1.15, upgrading it to 1.16 and 1.17. But for some reason, this is my only world that cannot open in 1.18.1.

In freezes on the loading screen at 0%

The world itself has a handmade datapack that creates some custom dimensions, but I removed them from the world folder, I updated/added/removed correctly some code lines from the json files and it still doesn't work.