I used datapacks for a world in 1.16.5. When I try to load the world in 1.17, it tells me to fix them or load the world in safe mode (which doesn't do anything). I tried updating the datapacks and it still doesn't load. I deleted all the datapacks from the datapack folder and the world still doesn't load. When I went back to 1.16.5 and disabled all the datapacks, it still wouldn't load in 1.17.