[main/ERROR] [minecraft/Main]: Failed to start the minecraft server
net.minecraftforge.fml.LoadingFailedException: Loading errors encountered: [
        FallingTree (fallingtree) has failed to load correctly
§7java.lang.NoSuchMethodError: 'void fr.rakambda.fallingtree.forge.client.event.PlayerLeaveListener.onPlayerLoggedOutEvent(net.minecraftforge.client.event.ClientPlayerNetworkEvent$LoggingOut)'
]
        at LAYER PLUGIN/[email protected]/net.minecraftforge.fml.ModLoader.waitForTransition(ModLoader.java:289) ~[fmlcore-1.21.6-56.0.7.jar!/:1.0]
        at LAYER PLUGIN/[email protected]/net.minecraftforge.fml.ModLoader.dispatchAndHandleError(ModLoader.java:251) ~[fmlcore-1.21.6-56.0.7.jar!/:1.0]
        at LAYER PLUGIN/[email protected]/net.minecraftforge.fml.ModLoader.gatherAndInitializeMods(ModLoader.java:215) ~[fmlcore-1.21.6-56.0.7.jar!/:1.0]
        at TRANSFORMER/[email protected]/net.minecraftforge.server.loading.ServerModLoader.load(ServerModLoader.java:30) ~[forge-1.21.6-56.0.7-universal.jar!/:?]
        at TRANSFORMER/[email protected]/net.minecraft.server.Main.main(Main.java:134) [forge-1.21.6-56.0.7-server.jar!/:?]
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104) ~[?:?]
        at java.base/java.lang.reflect.Method.invoke(Method.java:565) ~[?:?]
        at SECURE-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.targets.CommonLaunchHandler.runTarget(CommonLaunchHandler.java:96) [fmlloader-1.21.6-56.0.7.jar!/:?]
        at SECURE-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.targets.CommonLaunchHandler.lambda$makeService$0(CommonLaunchHandler.java:79) [fmlloader-1.21.6-56.0.7.jar!/:?]
        at SECURE-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:77) [modlauncher-10.2.4.jar!/:?]
        at SECURE-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:97) [modlauncher-10.2.4.jar!/:?]
        at SECURE-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.run(Launcher.java:116) [modlauncher-10.2.4.jar!/:?]
        at SECURE-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.main(Launcher.java:75) [modlauncher-10.2.4.jar!/:?]
        at SECURE-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapEntry.main(BootstrapEntry.java:17) [modlauncher-10.2.4.jar!/:?]
        at [email protected]/net.minecraftforge.bootstrap.Bootstrap.moduleMain(Bootstrap.java:188) [bootstrap-2.1.8.jar!/:?]
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104) ~[?:?]
        at java.base/java.lang.reflect.Method.invoke(Method.java:565) ~[?:?]
        at net.minecraftforge.bootstrap.Bootstrap.bootstrapMain(Bootstrap.java:133) [bootstrap-2.1.8.jar:2.1.8]
        at net.minecraftforge.bootstrap.Bootstrap.start(Bootstrap.java:53) [bootstrap-2.1.8.jar:2.1.8]
        at net.minecraftforge.bootstrap.ForgeBootstrap.main(ForgeBootstrap.java:19) [bootstrap-2.1.8.jar:2.1.8]
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104) ~[?:?]
        at java.base/java.lang.reflect.Method.invoke(Method.java:565) ~[?:?]
        at net.minecraftforge.bootstrap.shim.Main.main(Main.java:101) [forge-1.21.6-56.0.7-shim.jar:2.1.8]
Transformer Audit:
  net.minecraft.server.Main
    REASON: classloading
  net.minecraftforge.server.loading.ServerModLoader
    REASON: classloading