Forge version: forge-14.23.5.2854
Minecraft version: 1.12.2
Void Island Control version: 1.5.3
Additional mods:

• Advanced Rocketry
  version: 1.12.2-1.7.0-227-universal
• LibVulpes (for advanced rocketry)
  version: 1.12.2-0.4.2-75-universal

Config changes (from default)

• I:baseDimension=2
  2 means moon dimension.
  Also tried -2 (space station)

What happens:
Upon creating a fresh world with those 2 mods and a lib and that 1 line of changed code in the void island control configs, player spawn in an empty, void overworld. The hub/center bedrock platform does NOT spawn in.
Executing the command /island create trows an error: https://pastebin.com/tb57YKWZ
Executing the command /island create grass (using the default structure) teleports the user in that specified dimension but does NOT create a platform. By leaving the island /island leave and then creating a new island again /island create grass only then teleports to a wanted dimension AND with a island.

entire log: https://pastebin.com/QnEXmcTG

Not settings, besides that 1 line in void island control config to change spawn dimension, has been changed.

Altho i do not own any recording software and kinda lazy to download one, i have one to create gifs.

A gif showing whats happends: https://imgur.com/a/Hej61L9