Crashes on dedicated servers

[sandalle]

MC: 1.20.1 Forge: 47.1.3 Seamless: 2.0.0-forge-mc1.20

[17:52:27] [main/ERROR] [minecraft/Main]: Failed to start the minecraft server
net.minecraftforge.fml.LoadingFailedException: Loading errors encountered: [
        Seamless (seamless) has failed to load correctly
§7java.lang.ExceptionInInitializerError: null
]
        at net.minecraftforge.fml.ModLoader.waitForTransition(ModLoader.java:246) ~[fmlcore-1.20.1-47.1.3.jar%23592!/:?] {}
        at net.minecraftforge.fml.ModLoader.lambda$dispatchAndHandleError$20(ModLoader.java:210) ~[fmlcore-1.20.1-47.1.3.jar%23592!/:?] {}
        at java.util.Optional.ifPresent(Optional.java:178) ~[?:?] {re:mixin}
        at net.minecraftforge.fml.ModLoader.dispatchAndHandleError(ModLoader.java:210) ~[fmlcore-1.20.1-47.1.3.jar%23592!/:?] {}
        at net.minecraftforge.fml.ModLoader.lambda$gatherAndInitializeMods$13(ModLoader.java:183) ~[fmlcore-1.20.1-47.1.3.jar%23592!/:?] {}
        at java.lang.Iterable.forEach(Iterable.java:75) ~[?:?] {re:mixin}
        at net.minecraftforge.fml.ModLoader.gatherAndInitializeMods(ModLoader.java:183) ~[fmlcore-1.20.1-47.1.3.jar%23592!/:?] {}
        at net.minecraftforge.server.loading.ServerModLoader.load(ServerModLoader.java:32) ~[forge-1.20.1-47.1.3-universal.jar%23596!/:?] {re:classloading}
        at net.minecraft.server.Main.main(Main.java:125) ~[server-1.20.1-20230612.114412-srg.jar%23591!/:?] {re:mixin,re:classloading,pl:mixin:A}
        at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104) ~[?:?] {}
        at java.lang.reflect.Method.invoke(Method.java:577) ~[?:?] {}
        at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.runTarget(CommonLaunchHandler.java:111) ~[fmlloader-1.20.1-47.1.3.jar%2369!/:?] {}
        at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.serverService(CommonLaunchHandler.java:103) ~[fmlloader-1.20.1-47.1.3.jar%2369!/:?] {}
        at net.minecraftforge.fml.loading.targets.CommonServerLaunchHandler.lambda$makeService$0(CommonServerLaunchHandler.java:27) ~[fmlloader-1.20.1-47.1.3.jar%2369!/:?] {}
        at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30) ~[modlauncher-10.0.9.jar%2355!/:?] {}
        at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) ~[modlauncher-10.0.9.jar%2355!/:?] {}
        at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) ~[modlauncher-10.0.9.jar%2355!/:?] {}
        at cpw.mods.modlauncher.Launcher.run(Launcher.java:108) ~[modlauncher-10.0.9.jar%2355!/:?] {}
        at cpw.mods.modlauncher.Launcher.main(Launcher.java:78) ~[modlauncher-10.0.9.jar%2355!/:?] {}
        at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) ~[modlauncher-10.0.9.jar%2355!/:?] {}
        at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) ~[modlauncher-10.0.9.jar%2355!/:?] {}
        at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) ~[bootstraplauncher-1.1.2.jar:?] {}

seamless-1.4.1-forge-mc1.20 would load fine on a dedicated server (or at least skip DEDICATED_SERVER sided) so that mods can match between client and server. :)

[curryducker]

Seamless doesn't support server-side, i recommend using Better Compatibility Checker to not have the red mismatched cross show up

[sandalle]

Just FYI in case you need it: See https://docs.minecraftforge.net/en/1.20.x/concepts/sides/ for how to do it properly:

• Your mods are expected to always load, regardless of if they are loaded on the client or the server. For one-sided mods, this means that they must still run on the opposite physical side.

[LarsMans64]

Oh thanks, I didn't know about that