Since the new update of the snapshot came out (21w15a), I can not load my world anymore
MC-223223
Loading of world with extended height is disabled
Resolved
Works As Intended
0
"Worlds created in any version between snapshot 21w06a and 21w14a can no longer be opened" see the full changelog about this https://www.minecraft.net/en-us/article/minecraft-snapshot-21w15a