The crash:
[17:42:43] [main/ERROR]: Minecraft has crashed! net.fabricmc.loader.impl.FormattedException: java.lang.ExceptionInInitializerError at net.fabricmc.loader.impl.FormattedException.ofLocalized(FormattedException.java:63) ~[fabric-loader-0.14.19.jar:?] at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:464) ~[fabric-loader-0.14.19.jar:?] at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) [fabric-loader-0.14.19.jar:?] at net.fabricmc.loader.impl.launch.knot.KnotServer.main(KnotServer.java:23) [fabric-loader-0.14.19.jar:?] at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:69) [fabric-loader-0.14.19.jar:?] at net.fabricmc.installer.ServerLauncher.main(ServerLauncher.java:69) [cf_InsomniaHardcore1.18_1.2.4.jar:0.11.2] Caused by: java.lang.ExceptionInInitializerError at net.minecraft.class_2588.method_11025(class_2588.java:43) ~[server-intermediary.jar:?] at net.minecraft.class_2588.method_27659(class_2588.java:145) ~[server-intermediary.jar:?] at net.minecraft.class_2561.method_27657(class_2561.java:96) ~[server-intermediary.jar:?] at net.minecraft.class_5348.getString(class_5348.java:91) ~[server-intermediary.jar:?] at net.minecraft.class_2561.getString(class_2561.java:39) ~[server-intermediary.jar:?] at com.mojang.brigadier.exceptions.CommandSyntaxException.<init>(CommandSyntaxException.java:27) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.exceptions.SimpleCommandExceptionType.createWithContext(SimpleCommandExceptionType.java:21) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.StringReader.readDouble(StringReader.java:142) ~[brigadier-1.0.18.jar:?] at net.minecraft.class_2278.method_9743(class_2278.java:41) ~[server-intermediary.jar:?] at net.minecraft.class_2280.method_9750(class_2280.java:87) ~[server-intermediary.jar:?] at net.minecraft.class_2277.method_9738(class_2277.java:54) ~[server-intermediary.jar:?] at net.minecraft.class_2277.parse(class_2277.java:21) ~[server-intermediary.jar:?] at com.mojang.brigadier.tree.ArgumentCommandNode.isValidInput(ArgumentCommandNode.java:91) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.tree.CommandNode.findAmbiguities(CommandNode.java:102) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.tree.CommandNode.findAmbiguities(CommandNode.java:113) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.tree.CommandNode.findAmbiguities(CommandNode.java:113) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.CommandDispatcher.findAmbiguities(CommandDispatcher.java:695) ~[brigadier-1.0.18.jar:?] at net.minecraft.class_2170.<init>(class_2170.java:248) ~[server-intermediary.jar:?] at net.minecraft.class_5350.<init>(class_5350.java:43) ~[server-intermediary.jar:?] at net.minecraft.class_5350.method_29466(class_5350.java:80) ~[server-intermediary.jar:?] at net.minecraft.class_6904.method_40431(class_6904.java:44) ~[server-intermediary.jar:?] at net.minecraft.server.Main.main(Main.java:155) ~[server-intermediary.jar:?] at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:462) ~[fabric-loader-0.14.19.jar:?] ... 4 more Caused by: java.lang.IllegalArgumentException: Multiple entries with same key: block.minecraft.barrel=Spruce Barrel and block.minecraft.barrel=Barrel at com.google.common.collect.ImmutableMap.conflictException(ImmutableMap.java:376) ~[guava-31.0.1-jre.jar:?] at com.google.common.collect.ImmutableMap.checkNoConflict(ImmutableMap.java:370) ~[guava-31.0.1-jre.jar:?] at com.google.common.collect.RegularImmutableMap.checkNoConflictInKeyBucket(RegularImmutableMap.java:153) ~[guava-31.0.1-jre.jar:?] at com.google.common.collect.RegularImmutableMap.fromEntryArray(RegularImmutableMap.java:115) ~[guava-31.0.1-jre.jar:?] at com.google.common.collect.ImmutableMap$Builder.buildOrThrow(ImmutableMap.java:574) ~[guava-31.0.1-jre.jar:?] at com.google.common.collect.ImmutableMap$Builder.build(ImmutableMap.java:538) ~[guava-31.0.1-jre.jar:?] at net.minecraft.class_2477.method_29429(class_2477.java:45) ~[server-intermediary.jar:?] at net.minecraft.class_2477.<clinit>(class_2477.java:33) ~[server-intermediary.jar:?] at net.minecraft.class_2588.method_11025(class_2588.java:43) ~[server-intermediary.jar:?] at net.minecraft.class_2588.method_27659(class_2588.java:145) ~[server-intermediary.jar:?] at net.minecraft.class_2561.method_27657(class_2561.java:96) ~[server-intermediary.jar:?] at net.minecraft.class_5348.getString(class_5348.java:91) ~[server-intermediary.jar:?] at net.minecraft.class_2561.getString(class_2561.java:39) ~[server-intermediary.jar:?] at com.mojang.brigadier.exceptions.CommandSyntaxException.<init>(CommandSyntaxException.java:27) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.exceptions.SimpleCommandExceptionType.createWithContext(SimpleCommandExceptionType.java:21) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.StringReader.readDouble(StringReader.java:142) ~[brigadier-1.0.18.jar:?] at net.minecraft.class_2278.method_9743(class_2278.java:41) ~[server-intermediary.jar:?] at net.minecraft.class_2280.method_9750(class_2280.java:87) ~[server-intermediary.jar:?] at net.minecraft.class_2277.method_9738(class_2277.java:54) ~[server-intermediary.jar:?] at net.minecraft.class_2277.parse(class_2277.java:21) ~[server-intermediary.jar:?] at com.mojang.brigadier.tree.ArgumentCommandNode.isValidInput(ArgumentCommandNode.java:91) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.tree.CommandNode.findAmbiguities(CommandNode.java:102) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.tree.CommandNode.findAmbiguities(CommandNode.java:113) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.tree.CommandNode.findAmbiguities(CommandNode.java:113) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.CommandDispatcher.findAmbiguities(CommandDispatcher.java:695) ~[brigadier-1.0.18.jar:?] at net.minecraft.class_2170.<init>(class_2170.java:248) ~[server-intermediary.jar:?] at net.minecraft.class_5350.<init>(class_5350.java:43) ~[server-intermediary.jar:?] at net.minecraft.class_5350.method_29466(class_5350.java:80) ~[server-intermediary.jar:?] at net.minecraft.class_6904.method_40431(class_6904.java:44) ~[server-intermediary.jar:?] at net.minecraft.server.Main.main(Main.java:155) ~[server-intermediary.jar:?] at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:462) ~[fabric-loader-0.14.19.jar:?] ... 4 more
The title says it all. If I remove Discord4Fabric, the server is able to start like normal.
Versions tested: '1.10.1', '1.10.0' & '1.9.0' Modlist: https://wiki.crismpack.net/modpacks/insomnia-hardcore/modlist
The crash:
[17:42:43] [main/ERROR]: Minecraft has crashed! net.fabricmc.loader.impl.FormattedException: java.lang.ExceptionInInitializerError at net.fabricmc.loader.impl.FormattedException.ofLocalized(FormattedException.java:63) ~[fabric-loader-0.14.19.jar:?] at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:464) ~[fabric-loader-0.14.19.jar:?] at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) [fabric-loader-0.14.19.jar:?] at net.fabricmc.loader.impl.launch.knot.KnotServer.main(KnotServer.java:23) [fabric-loader-0.14.19.jar:?] at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:69) [fabric-loader-0.14.19.jar:?] at net.fabricmc.installer.ServerLauncher.main(ServerLauncher.java:69) [cf_InsomniaHardcore1.18_1.2.4.jar:0.11.2] Caused by: java.lang.ExceptionInInitializerError at net.minecraft.class_2588.method_11025(class_2588.java:43) ~[server-intermediary.jar:?] at net.minecraft.class_2588.method_27659(class_2588.java:145) ~[server-intermediary.jar:?] at net.minecraft.class_2561.method_27657(class_2561.java:96) ~[server-intermediary.jar:?] at net.minecraft.class_5348.getString(class_5348.java:91) ~[server-intermediary.jar:?] at net.minecraft.class_2561.getString(class_2561.java:39) ~[server-intermediary.jar:?] at com.mojang.brigadier.exceptions.CommandSyntaxException.<init>(CommandSyntaxException.java:27) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.exceptions.SimpleCommandExceptionType.createWithContext(SimpleCommandExceptionType.java:21) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.StringReader.readDouble(StringReader.java:142) ~[brigadier-1.0.18.jar:?] at net.minecraft.class_2278.method_9743(class_2278.java:41) ~[server-intermediary.jar:?] at net.minecraft.class_2280.method_9750(class_2280.java:87) ~[server-intermediary.jar:?] at net.minecraft.class_2277.method_9738(class_2277.java:54) ~[server-intermediary.jar:?] at net.minecraft.class_2277.parse(class_2277.java:21) ~[server-intermediary.jar:?] at com.mojang.brigadier.tree.ArgumentCommandNode.isValidInput(ArgumentCommandNode.java:91) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.tree.CommandNode.findAmbiguities(CommandNode.java:102) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.tree.CommandNode.findAmbiguities(CommandNode.java:113) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.tree.CommandNode.findAmbiguities(CommandNode.java:113) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.CommandDispatcher.findAmbiguities(CommandDispatcher.java:695) ~[brigadier-1.0.18.jar:?] at net.minecraft.class_2170.<init>(class_2170.java:248) ~[server-intermediary.jar:?] at net.minecraft.class_5350.<init>(class_5350.java:43) ~[server-intermediary.jar:?] at net.minecraft.class_5350.method_29466(class_5350.java:80) ~[server-intermediary.jar:?] at net.minecraft.class_6904.method_40431(class_6904.java:44) ~[server-intermediary.jar:?] at net.minecraft.server.Main.main(Main.java:155) ~[server-intermediary.jar:?] at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:462) ~[fabric-loader-0.14.19.jar:?] ... 4 more Caused by: java.lang.IllegalArgumentException: Multiple entries with same key: block.minecraft.barrel=Spruce Barrel and block.minecraft.barrel=Barrel at com.google.common.collect.ImmutableMap.conflictException(ImmutableMap.java:376) ~[guava-31.0.1-jre.jar:?] at com.google.common.collect.ImmutableMap.checkNoConflict(ImmutableMap.java:370) ~[guava-31.0.1-jre.jar:?] at com.google.common.collect.RegularImmutableMap.checkNoConflictInKeyBucket(RegularImmutableMap.java:153) ~[guava-31.0.1-jre.jar:?] at com.google.common.collect.RegularImmutableMap.fromEntryArray(RegularImmutableMap.java:115) ~[guava-31.0.1-jre.jar:?] at com.google.common.collect.ImmutableMap$Builder.buildOrThrow(ImmutableMap.java:574) ~[guava-31.0.1-jre.jar:?] at com.google.common.collect.ImmutableMap$Builder.build(ImmutableMap.java:538) ~[guava-31.0.1-jre.jar:?] at net.minecraft.class_2477.method_29429(class_2477.java:45) ~[server-intermediary.jar:?] at net.minecraft.class_2477.<clinit>(class_2477.java:33) ~[server-intermediary.jar:?] at net.minecraft.class_2588.method_11025(class_2588.java:43) ~[server-intermediary.jar:?] at net.minecraft.class_2588.method_27659(class_2588.java:145) ~[server-intermediary.jar:?] at net.minecraft.class_2561.method_27657(class_2561.java:96) ~[server-intermediary.jar:?] at net.minecraft.class_5348.getString(class_5348.java:91) ~[server-intermediary.jar:?] at net.minecraft.class_2561.getString(class_2561.java:39) ~[server-intermediary.jar:?] at com.mojang.brigadier.exceptions.CommandSyntaxException.<init>(CommandSyntaxException.java:27) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.exceptions.SimpleCommandExceptionType.createWithContext(SimpleCommandExceptionType.java:21) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.StringReader.readDouble(StringReader.java:142) ~[brigadier-1.0.18.jar:?] at net.minecraft.class_2278.method_9743(class_2278.java:41) ~[server-intermediary.jar:?] at net.minecraft.class_2280.method_9750(class_2280.java:87) ~[server-intermediary.jar:?] at net.minecraft.class_2277.method_9738(class_2277.java:54) ~[server-intermediary.jar:?] at net.minecraft.class_2277.parse(class_2277.java:21) ~[server-intermediary.jar:?] at com.mojang.brigadier.tree.ArgumentCommandNode.isValidInput(ArgumentCommandNode.java:91) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.tree.CommandNode.findAmbiguities(CommandNode.java:102) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.tree.CommandNode.findAmbiguities(CommandNode.java:113) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.tree.CommandNode.findAmbiguities(CommandNode.java:113) ~[brigadier-1.0.18.jar:?] at com.mojang.brigadier.CommandDispatcher.findAmbiguities(CommandDispatcher.java:695) ~[brigadier-1.0.18.jar:?] at net.minecraft.class_2170.<init>(class_2170.java:248) ~[server-intermediary.jar:?] at net.minecraft.class_5350.<init>(class_5350.java:43) ~[server-intermediary.jar:?] at net.minecraft.class_5350.method_29466(class_5350.java:80) ~[server-intermediary.jar:?] at net.minecraft.class_6904.method_40431(class_6904.java:44) ~[server-intermediary.jar:?] at net.minecraft.server.Main.main(Main.java:155) ~[server-intermediary.jar:?] at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:462) ~[fabric-loader-0.14.19.jar:?] ... 4 more