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1. Minecraft version: 1.12.2 - Forge 14.23.5.2859
2. Galacticraft version: 4.0.6
3. GalaxySpace version: 2.1.0
4. AsmodeusCore version (for 2.0.1 version and above): 1.0.0
5. Side (Single player (SSP), Multiplayer (SMP), or SSP opened to LAN (LAN)): Multiplayer
6. Other add-ons:

Description of the issue:
Server unable to start with GalaxySpace version 2.1.0 and AsmodeusCore 1.0.0.

Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/renderer/block/statemap/IStateMapper
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.renderer.block.statemap.IStateMapper
Caused by: java.lang.NullPointerException

Screenshot/Video:

Attached log file (or url on pastebin.com):
crash-2023-08-21_23.15.37-server.txt
debug.log
latest.log

Issue has been solved in GalaxySpace 2.1.1.