Server crashing from new biomes/update

[Victoria Dalazen]

Plugin version: 7.2.18

Spigot username: Vicenzo

Issue: Every time I create a new world using the "Heat pack" options that contains new biomes, and tp to one of these biomes (EX: Savannah) the terrain stops rendering, and the console spams this error:

Link to settings.json: (The world that crashes the server) http://hastebin.com/sazabudowa.json

Link to error log/ crash log: http://hastebin.com/ixemutubav.xml

[scabbed]

server crash because heat pack contains 1.9 /1.10 blocks in structure and it seems your are using minecraft version 1.8.8