I transfered my singleplayer world to my server but now it crashes on start:

Crash Report:
crash-2018-10-31_17.57.03-server.txt

On my server.properties i've wrote:
level-type=OTG
level-name=Biome Bundle
but it still doesn't work.
What should I do?

Hey, thanks for reporting. Should be fixed with v7, you can grab a dev build from the OTG Discord at /openterraingen. Cheers.