Follow up: Turned out it's caused by Fast Furnace and VF. forgot to delete them from the server files. also deleted stardard expansion which has been merged into BQU.

Anyways I guess this kind of incompat actually triggered the LoliIncompatibilityHandler or whatever it is on the wrong side?

Using censoredasm5.18

Caused by: java.lang.RuntimeException: Attempted to load class zone/rong/loliasm/client/LoliIncompatibilityHandler$Exception for invalid side SERVER
    at net.minecraftforge.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:62)
    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:256)
    ... 41 more

Full crash report: https://mclo.gs/IWE5qZh

Yeah, the server triggers a GUI class that doesn't exist, it'll be fixed soon:tm:

Duplicate of #147