Client crashes when connecting to J21 Server

[divine-ray]

Your GTNH Discord Username

divine_ray

Your Pack Version

2.6.0 J21

Your Server

Private

Java Version

Java 21

Type of Server

Vanilla Forge

Your Actions

Trying to connect to the server yields a NPE crash (attached).
Client has additional mods (Hodgepodge 2.4.6, WorldEdit v0.0.5, Just Enough Calculation 1.7.10-4.0)

Crash Report

https://mclo.gs/w40hHQ9

Final Checklist

• I have searched this issue tracker and there is nothing similar already. Posting on a closed issue saying the crash still exists will prompt us to investigate and reopen it once we confirm your report.
• I can reproduce this crash consistently by following the exact steps I described above.
• I have asked other people and they confirm they also crash by following the exact steps I described above.

[github-actions]

Found 1 linked crash report(s)

Primitive Automated Analysis of Crash Report

https://mclo.gs/w40hHQ9

Stacktrace

java.lang.NullPointerException: Cannot invoke "cpw.mods.fml.common.network.handshake.NetworkDispatcher.rejectHandshake(String)" because "this.dispatcher" is null
at cpw.mods.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:101)
at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:212)
at net.minecraft.client.multiplayer.GuiConnecting.updateScreen(SourceFile:78)
at net.minecraft.client.Minecraft.runTick(Minecraft.java:1661)
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:973)
at net.minecraft.client.Minecraft.run(Minecraft.java:4110)
at net.minecraft.client.main.Main.main(SourceFile:148)
at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.lang.reflect.Method.invoke(Method.java:580)
at net.minecraft.launchwrapper.Launch.rfb$realLaunch(Launch.java:250)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:35)
at net.minecraft.launchwrapper.Launch.main(Launch.java:60)
at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.lang.reflect.Method.invoke(Method.java:580)
at com.gtnewhorizons.retrofuturabootstrap.Main.main(Main.java:219)
at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:88)
at org.prismlauncher.EntryPoint.listen(EntryPoint.java:126)
at org.prismlauncher.EntryPoint.main(EntryPoint.java:71)

Missing mods

• journeymap-1.7.10-5.2.3-fairplay.jar
• hodgepodge-2.4.43.jar
• angelica-1.0.0-alpha40.jar

Added mods

• hodgepodge-2.4.6.jar (Hodgepodge)
• worldedit-v0.0.5.jar (WorldEdit)
• JustEnoughCalculation-1.7.10-4.0.jar (Just Enough Calculation)
• journeymap-1.7.10-5.1.4p6-unlimited.jar (JourneyMap)

[chochem]

why would you change hodgepodge to an older version

[boubou19]

and JM update was made because it has fixes for memory leaks. You should use the corresponding unlimited version from CF rather than a plain dowgrade.