Hi, when I start the forge server I'll get the following exception:

[Server thread/ERROR]: Encountered an unexpected exception
net.minecraftforge.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/client/entity/EntityPlayerSP

at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:172) ~[LoadController.class:?]
at net.minecraftforge.fml.common.Loader.initializeMods(Loader.java:739) ~[Loader.class:?]
at net.minecraftforge.fml.server.FMLServerHandler.finishServerLoading(FMLServerHandler.java:96) ~[FMLServerHandler.class:?]
at net.minecraftforge.fml.common.FMLCommonHandler.onServerStarted(FMLCommonHandler.java:325) ~[FMLCommonHandler.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:212) ~[la.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_77]

Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/entity/EntityPlayerSP
at vazkii.botania.common.lexicon.LexiconData.init(LexiconData.java:791) ~[LexiconData.class:?]
at vazkii.botania.common.core.proxy.CommonProxy.init(CommonProxy.java:132) ~[CommonProxy.class:?]
at vazkii.botania.common.Botania.init(Botania.java:106) ~[Botania.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_77]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_77]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_77]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_77]
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:560) ~[forge-1.9-12.16.0.1811-1.9-universal.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_77]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_77]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_77]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_77]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[minecraft_server.1.9.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[minecraft_server.1.9.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[minecraft_server.1.9.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[minecraft_server.1.9.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[minecraft_server.1.9.jar:?]
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:221) ~[LoadController.class:?]
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:199) ~[LoadController.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_77]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_77]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_77]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_77]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[minecraft_server.1.9.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[minecraft_server.1.9.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[minecraft_server.1.9.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[minecraft_server.1.9.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[minecraft_server.1.9.jar:?]
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:128) ~[LoadController.class:?]
at net.minecraftforge.fml.common.Loader.initializeMods(Loader.java:737) ~[Loader.class:?]

Is this a known problem, or am I doing something wrong here?

@williewillus Thanks for the fast reply, I guess it's not pushed yet?

known issue, fixed in dev