java.lang.NoClassDefFoundError: org/lwjgl/opengl/GL11
at com.mic.testmod.blocks.machine.watersource.BlockWaterSource.(BlockWaterSource.java:40)

Full Crash Report
Server crashes with the Cosmic Armory but works when it's removed
Singleplayer client worked fine

If I figure out which mod it is incompatible with I'll post here