GTNH requires some specific Java arguments and requires you to select the patched Jar:
https://discourse.cubecoders.com/t/setting-up-a-modded-java-minecraft-server/26535#p-50642-h-323-gtnh-40
GTNH requires some specific Java arguments and requires you to select the patched Jar:
https://discourse.cubecoders.com/t/setting-up-a-modded-java-minecraft-server/26535#p-50642-h-323-gtnh-40