Server crashes when mousing over ancient warfare block in jei with engineering bench open.
ancientwarfare-1.12.2-2.6.1.251
forge-1.12.2-14.23.3.2697

Description: Updating screen events

java.lang.NoClassDefFoundError: mezz/jei/config/SessionData at net.shadowmage.ancientwarfare.core.compat.jei.MultiRecipeTransferHandler.transferRecipe(MultiRecipeTransferHandler.java:80)
at mezz.jei.transfer.RecipeTransferUtil.transferRecipe(RecipeTransferUtil.java:46)
at mezz.jei.transfer.RecipeTransferUtil.getTransferRecipeError(RecipeTransferUtil.java:21)
at mezz.jei.gui.recipes.RecipeTransferButton.init(RecipeTransferButton.java:28)
at mezz.jei.gui.recipes.RecipesGui.addRecipeTransferButtons(RecipesGui.java:474)
at mezz.jei.gui.recipes.RecipesGui.updateLayout(RecipesGui.java:451)
at mezz.jei.gui.recipes.RecipesGui.func_73866_w_(RecipesGui.java:166)
at net.minecraft.client.gui.GuiScreen.func_146280_a(GuiScreen.java:478)
at net.minecraft.client.Minecraft.func_147108_a(Minecraft.java:1016)
at mezz.jei.gui.recipes.RecipesGui.open(RecipesGui.java:357)
at mezz.jei.gui.recipes.RecipesGui.show(RecipesGui.java:377)
at mezz.jei.input.InputHandler.handleMouseClickedFocus(InputHandler.java:164)
at mezz.jei.input.InputHandler.handleMouseClick(InputHandler.java:117)
at mezz.jei.input.InputHandler.handleMouseEvent(InputHandler.java:89)
at mezz.jei.input.InputHandler.onGuiMouseEvent(InputHandler.java:78)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_2132_InputHandler_onGuiMouseEvent_Pre.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:500)

https://pastebin.com/ad6X1xx4