Hello, I am the Leader of the ChronosCord Development Team, we are currently attempting to create a custom minigames and I need this problem to be fixed. If you need more information about this problem please let me know. 1st issue: Console says this when i do the command /mv create (world name) normal -g SB-Skylands [WARN]: [Multiverse-Core] Failed to get the default chunk generator: java.lang.NoClassDefFoundError: net/minecraft/server/v1_10_R1/Block [WARN]: [Multiverse-Core] This is a bug in SB-Skylands, NOT a bug in Multiverse! 2nd issue: When i do the command (same command as first issue) it says in chat Invalid generator! 'SB-Skylands'. Aborting world creation. Please help me figure out this problem for we are trying to release this mini game soon.