[Crash] NoSuchMethodError on MinecraftServer.isDedicatedServer() on startup
Closed this issue ยท 3 comments
Loader: Fabric (0.17.2)
Version: 1.20.1
Fabric API: 0.92.6
The game server crashes immediately during startup with a NoSuchMethodError with boolean net.minecraft.server.MinecraftServer.isDedicatedServer().
Crash Source:
---- Minecraft Crash Report ----
// Daisy, daisy...
Time: 2025-09-06 10:47:30
Description: Exception in server tick loop
java.lang.NoSuchMethodError: 'boolean net.minecraft.server.MinecraftServer.isDedicatedServer()'
at knot//com.vecoo.extralib.world.UtilWorld.worldDirectory(UtilWorld.java:22)
at knot//com.vecoo.extraquests.storage.quests.TimerProvider.<init>(TimerProvider.java:18)
at knot//com.vecoo.extraquests.ExtraQuests.loadStorage(ExtraQuests.java:61)
at knot//com.vecoo.extraquests.ExtraQuests.lambda$onInitialize$1(ExtraQuests.java:45)
at knot//net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.lambda$static$2(ServerLifecycleEvents.java:49)
at knot//net.minecraft.server.MinecraftServer.handler$chj000$fabric-lifecycle-events-v1$afterSetupServer(MinecraftServer.java:4842)
at knot//net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:650)
at knot//net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:265)
at java.base/java.lang.Thread.run(Unknown Source)
I need a little more information:
- ExtraLib version.
- ExtraQuests version.
- Are you using a kernel to launch and are you launching in singleplayer or on a server?
Extralib v. 1.7.4
Extraquests v. 1.5.4
I do not know what a kernel is, so it's unlikely. This happened in singleplayer. The build is from Modrinth.