How to Train Your Dragon

I bought the update but it doesn't work, when the world is created I get into an empty world where there is just an ocean https://www.minecraft.net/en-us/marketplace/pdp?id=4f7cf58b-e6d7-46ea-9f8c-206d97f2bafe?id=4f7cf58b-e6d7-46ea-9f8c-206d97f2bafe#

https://marketplace.minecraft.net/en-us/pdp?id=bbf7480e-9f29-4f89-b453-681c4ba4c74e