it looks like thomthin gows wrong with the mod "LanteaCraft".
After i remove the mod i can start the map without problems.
And also the map still work if i put the mod later back.
Maybe some blocks now are gon but its fine to play.
If u want i reupload the world.
Or u remove the mod, start one time the map (answer the warnig with yes) and save the map.
Put the mod in again and play normal.
Hop that helps u.
P.s.: Sorry for late answer. RL are realy hard at the moment for my.