Crashes on hover over in gui.

Minecraft 1.12.2
Forge 14.23.5.2838
Graves 1.3.1
Extended 1.3.5.1

java.lang.NullPointerException: Rendering screen
at nightkosh.gravestone_extended.item.corpse.VillagerCorpseHelper.getNotVanillaVillagerProfession(VillagerCorpseHelper.java:266)
at nightkosh.gravestone_extended.item.corpse.VillagerCorpseHelper.getVillagerProfession(VillagerCorpseHelper.java:198)
at nightkosh.gravestone_extended.item.corpse.VillagerCorpseHelper.getProfession(VillagerCorpseHelper.java:168)
at nightkosh.gravestone_extended.item.corpse.VillagerCorpseHelper.addInfo(VillagerCorpseHelper.java:149)
at nightkosh.gravestone_extended.item.corpse.CorpseHelper.addInfo(CorpseHelper.java:80)
at nightkosh.gravestone_extended.item.itemblock.IBCorpse.func_77624_a(IBCorpse.java:45)
at net.minecraft.item.ItemStack.func_82840_a(ItemStack.java:707)
at net.minecraft.client.gui.GuiScreen.func_191927_a(GuiScreen.java:143)
at net.minecraft.client.gui.GuiScreen.func_146285_a(GuiScreen.java:137)
at net.minecraft.client.gui.inventory.GuiContainer.func_191948_b(GuiContainer.java:175)
at net.minecraft.client.gui.inventory.GuiInventory.func_73863_a(SourceFile:79)
at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:396)
at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1124)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1119)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)