Server throws Error if JEI is not installed

[mouse0270]

Well trying to debug issue #7 I setup a new server running just productive bees. However the server threw errors

[09May2020 11:28:22.373] [Server thread/ERROR] [net.minecraft.server.MinecraftServer/]: Failed to reload data packs
java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: mezz/jei/api/ingredients/IIngredientHelper
	at java.util.concurrent.CompletableFuture.reportGet(Unknown Source) ~[?:1.8.0_251]
	at java.util.concurrent.CompletableFuture.get(Unknown Source) ~[?:1.8.0_251]
	at net.minecraft.server.MinecraftServer.func_195568_a(MinecraftServer.java:1467) [?:?]
	at net.minecraft.server.MinecraftServer.func_195560_a(MinecraftServer.java:450) [?:?]
	at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:363) [?:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:212) [?:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:613) [?:?]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_251]
Caused by: java.lang.NoClassDefFoundError: mezz/jei/api/ingredients/IIngredientHelper
	at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_251]
	at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_251]
	at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_251]
	at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:127) ~[modlauncher-5.1.0.jar:?]
	at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:96) ~[modlauncher-5.1.0.jar:?]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_251]
	at cy.jdkdigital.productivebees.recipe.AdvancedBeehiveRecipe$Serializer.read(AdvancedBeehiveRecipe.java:116) ~[?:1.15.2-0.1.3]
	at cy.jdkdigital.productivebees.recipe.AdvancedBeehiveRecipe$Serializer.func_199425_a_(AdvancedBeehiveRecipe.java:105) ~[?:1.15.2-0.1.3]
	at net.minecraft.item.crafting.RecipeManager.func_215377_a(RecipeManager.java:134) ~[?:?]
	at net.minecraft.item.crafting.RecipeManager.func_212853_a_(RecipeManager.java:60) ~[?:?]
	at net.minecraft.item.crafting.RecipeManager.func_212853_a_(RecipeManager.java:37) ~[?:?]
	at net.minecraft.client.resources.ReloadListener.func_215269_a(SourceFile:13) ~[?:?]
	at java.util.concurrent.CompletableFuture.uniAccept(Unknown Source) ~[?:1.8.0_251]
	at java.util.concurrent.CompletableFuture$UniAccept.tryFire(Unknown Source) ~[?:1.8.0_251]
	at java.util.concurrent.CompletableFuture$Completion.run(Unknown Source) ~[?:1.8.0_251]
	at net.minecraft.resources.AsyncReloader.func_219557_a(SourceFile:71) ~[?:?]
	at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
	at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(SourceFile:144) ~[?:?]
	at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
	at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:731) ~[?:?]
	at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:141) ~[?:?]
	at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(SourceFile:118) ~[?:?]
	at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:714) ~[?:?]
	at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:708) ~[?:?]
	at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213161_c(SourceFile:127) ~[?:?]
	at net.minecraft.server.MinecraftServer.func_195568_a(MinecraftServer.java:1464) ~[?:?]
	... 5 more
Caused by: java.lang.ClassNotFoundException: mezz.jei.api.ingredients.IIngredientHelper
	at java.lang.ClassLoader.findClass(Unknown Source) ~[?:1.8.0_251]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_251]
	at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:101) ~[modlauncher-5.1.0.jar:?]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_251]
	at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_251]
	at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_251]
	at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_251]
	at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:127) ~[modlauncher-5.1.0.jar:?]
	at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:96) ~[modlauncher-5.1.0.jar:?]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_251]
	at cy.jdkdigital.productivebees.recipe.AdvancedBeehiveRecipe$Serializer.read(AdvancedBeehiveRecipe.java:116) ~[?:1.15.2-0.1.3]
	at cy.jdkdigital.productivebees.recipe.AdvancedBeehiveRecipe$Serializer.func_199425_a_(AdvancedBeehiveRecipe.java:105) ~[?:1.15.2-0.1.3]
	at net.minecraft.item.crafting.RecipeManager.func_215377_a(RecipeManager.java:134) ~[?:?]
	at net.minecraft.item.crafting.RecipeManager.func_212853_a_(RecipeManager.java:60) ~[?:?]
	at net.minecraft.item.crafting.RecipeManager.func_212853_a_(RecipeManager.java:37) ~[?:?]
	at net.minecraft.client.resources.ReloadListener.func_215269_a(SourceFile:13) ~[?:?]
	at java.util.concurrent.CompletableFuture.uniAccept(Unknown Source) ~[?:1.8.0_251]
	at java.util.concurrent.CompletableFuture$UniAccept.tryFire(Unknown Source) ~[?:1.8.0_251]
	at java.util.concurrent.CompletableFuture$Completion.run(Unknown Source) ~[?:1.8.0_251]
	at net.minecraft.resources.AsyncReloader.func_219557_a(SourceFile:71) ~[?:?]
	at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
	at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(SourceFile:144) ~[?:?]
	at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
	at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:731) ~[?:?]
	at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:141) ~[?:?]
	at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(SourceFile:118) ~[?:?]
	at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:714) ~[?:?]
	at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:708) ~[?:?]
	at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213161_c(SourceFile:127) ~[?:?]
	at net.minecraft.server.MinecraftServer.func_195568_a(MinecraftServer.java:1464) ~[?:?]
	... 5 more

2020-05-09-2.log