[NeoForge][1.21.3] Error at start on server side

[KasaiJo]

Instructions

At server start :

[10:37:21.221] [main/ERROR] [common.asm.RuntimeDistCleaner/DISTXFORM]: Attempted to load class net/minecraft/client/Minecraft for invalid dist DEDICATED_SERVER 

In view of the error, it seems that the mod launche as if it were client-side (not sure about this).
Note:

• this does not crash the server.
• No error if I remove the mod

---

Version Information

• Server panel: PufferPanel "latest"
• Server minecraft: neoforge-21.3.40-beta
• Mod lithium: lithium-neoforge-0.14.2-snapshot+mc1.21.3-build.91

Expected Behavior

No error at start

Reproduction Steps

1. Fresh neoforge install
2. First server start
3. Stop server
4. Copy mod on "mods" folder
5. Start server
6. -> Error on log

Other Information

Full start log:

DAEMON
 Starting server
DAEMON
 Starting container
[10:53:29.339] [main/INFO] [Launcher/MODLAUNCHER]: ModLauncher running: args [--launchTarget, forgeserver, --fml.neoForgeVersion, 21.3.40-beta, --fml.fmlVersion, 5.0.1, --fml.mcVersion, 1.21.3, --fml.neoFormVersion, 20241023.131943, nogui] 
[10:53:29.341] [main/INFO] [Launcher/MODLAUNCHER]: JVM identified as Eclipse Adoptium OpenJDK 64-Bit Server VM 21.0.5+11-LTS 
[10:53:29.343] [main/INFO] [Launcher/MODLAUNCHER]: ModLauncher 11.0.4+main.d2e20e43 starting: java version 21.0.5 by Eclipse Adoptium; OS Linux arch amd64 version 6.1.0-26-amd64 
[10:53:29.448] [main/INFO] [loading.ImmediateWindowHandler/]: ImmediateWindowProvider not loading because launch target is forgeserver 
[10:53:29.494] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.7 Source=union:/pufferpanel/libraries/net/fabricmc/sponge-mixin/0.15.2+mixin.0.8.7/sponge-mixin-0.15.2+mixin.0.8.7.jar%2385!/ Service=ModLauncher Env=SERVER 
[10:53:29.763] [main/INFO] [loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "server-1.21.3-20241023.131943-srg.jar" [locator: production server provider +net.neoforged:neoforge:21.3.40-beta:server] 
[10:53:29.777] [main/INFO] [loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "neoforge-21.3.40-beta-universal.jar" [locator: PathBasedLocator[name=neoforge, paths=[libraries/net/neoforged/neoforge/21.3.40-beta/neoforge-21.3.40-beta-universal.jar]], reader: mod manifest] 
[10:53:29.784] [main/INFO] [loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "lithium-neoforge-0.14.2-snapshot+mc1.21.3-build.91.jar" [locator: {mods folder locator at /pufferpanel/mods}, reader: mod manifest] 
[10:53:29.872] [main/INFO] [loading.moddiscovery.locators.JarInJarDependencyLocator/]: Found 2 dependencies adding them to mods collection 
[10:53:29.873] [main/INFO] [loading.moddiscovery.ModDiscoverer/SCAN]: Found gamelibrary file "mixinextras-neoforge-0.4.1.jar" [parent: neoforge-21.3.40-beta-universal.jar, locator: jarinjar, reader: mod manifest] 
[10:53:29.873] [main/INFO] [loading.moddiscovery.ModDiscoverer/SCAN]: Found library file "net.neoforged.neoforge-coremods-21.3.40-beta.jar" [parent: neoforge-21.3.40-beta-universal.jar, locator: jarinjar, reader: mod manifest] 
[10:53:29.875] [main/INFO] [loading.moddiscovery.ModDiscoverer/]: 
     Mod List:
		Name Version (Mod Id)

		Lithium 0.14.2-snapshot+mc1.21.3-build.91 (lithium)
		Minecraft 1.21.3 (minecraft)
		NeoForge 21.3.40-beta (neoforge) 
[10:53:30.191] [main/INFO] [mixin/]: Compatibility level set to JAVA_21 
[10:53:30.205] [main/INFO] [LaunchServiceHandler/MODLAUNCHER]: Launching target 'forgeserver' with arguments [nogui] 
[10:53:30.254] [main/INFO] [LithiumConfig/]: Option 'mixin.experimental.entity.block_caching.suffocation' requires 'mixin.util.block_tracking=true' but found 'false'. Setting 'mixin.experimental.entity.block_caching.suffocation=false'. 
[10:53:30.254] [main/INFO] [LithiumConfig/]: Option 'mixin.experimental.entity.block_caching.block_support' requires 'mixin.util.block_tracking=true' but found 'false'. Setting 'mixin.experimental.entity.block_caching.block_support=false'. 
[10:53:30.254] [main/INFO] [LithiumConfig/]: Option 'mixin.experimental.entity.block_caching.block_touching' requires 'mixin.util.block_tracking=true' but found 'false'. Setting 'mixin.experimental.entity.block_caching.block_touching=false'. 
[10:53:30.255] [main/INFO] [LithiumConfig/]: Option 'mixin.experimental.entity.block_caching' requires 'mixin.util.block_tracking=true' but found 'false'. Setting 'mixin.experimental.entity.block_caching=false'. 
[10:53:30.255] [main/INFO] [Lithium/]: Loaded configuration file for Lithium: 136 options available, 0 override(s) found 
[10:53:30.260] [main/WARN] [mixin/]: Reference map 'lithium-neoforge.refmap.json' for lithium-neoforge.mixins.json could not be read. If this is a development environment you can ignore this message 

|
v
[10:53:30.742] [main/ERROR] [common.asm.RuntimeDistCleaner/DISTXFORM]: Attempted to load class net/minecraft/client/Minecraft for invalid dist DEDICATED_SERVER 

[10:53:30.750] [main/WARN] [mixin/]: Error loading class: net/minecraft/client/Minecraft (java.lang.RuntimeException: Attempted to load class net/minecraft/client/Minecraft for invalid dist DEDICATED_SERVER) 
[10:53:30.750] [main/WARN] [mixin/]: @Mixin target net.minecraft.client.Minecraft was not found lithium-neoforge.mixins.json:startup.MinecraftMixin from mod lithium 
[10:53:30] [main/INFO] [MixinExtras|Service/]: Initializing MixinExtras via com.llamalad7.mixinextras.service.MixinExtrasServiceImpl(version=0.4.1).
[10:53:36] [modloading-worker-0/INFO] [ne.ne.ne.co.NeoForgeMod/NEOFORGE-MOD]: NeoForge mod loading, version 21.3.40-beta, for MC 1.21.3
[10:53:36] [main/INFO] [mojang/YggdrasilAuthenticationService]: Environment: Environment[sessionHost=https://sessionserver.mojang.com, servicesHost=https://api.minecraftservices.com, name=PROD]
[10:53:36] [main/WARN] [minecraft/VanillaPackResourcesBuilder]: Assets URL 'union:/pufferpanel/libraries/net/minecraft/server/1.21.3-20241023.131943/server-1.21.3-20241023.131943-srg.jar%23142!/assets/.mcassetsroot' uses unexpected schema
[10:53:36] [main/WARN] [minecraft/VanillaPackResourcesBuilder]: Assets URL 'union:/pufferpanel/libraries/net/minecraft/server/1.21.3-20241023.131943/server-1.21.3-20241023.131943-srg.jar%23142!/data/.mcassetsroot' uses unexpected schema
[10:53:37] [main/INFO] [minecraft/RecipeManager]: Loaded 1337 recipes
[10:53:37] [main/INFO] [minecraft/AdvancementTree]: Loaded 1448 advancements
[10:53:38] [Server thread/INFO] [minecraft/DedicatedServer]: Starting minecraft server version 1.21.3
[10:53:38] [Server thread/INFO] [minecraft/DedicatedServer]: Loading properties
[10:53:38] [Server thread/INFO] [minecraft/DedicatedServer]: Default game type: SURVIVAL
[10:53:38] [Server thread/INFO] [minecraft/MinecraftServer]: Generating keypair
[10:53:38] [Server thread/INFO] [minecraft/DedicatedServer]: Starting Minecraft server on 0.0.0.0:2565
[10:53:38] [Server thread/INFO] [minecraft/ServerConnectionListener]: Using epoll channel type
[10:53:38] [Server thread/INFO] [minecraft/DedicatedServer]: Preparing level "world"
[10:53:38] [Server thread/INFO] [minecraft/MinecraftServer]: Preparing start region for dimension minecraft:overworld
[10:53:39] [Worker-Main-4/INFO] [minecraft/LoggerChunkProgressListener]: Preparing spawn area: 0%
[10:53:39] [Worker-Main-4/INFO] [minecraft/LoggerChunkProgressListener]: Preparing spawn area: 0%
[10:53:39] [Worker-Main-4/INFO] [minecraft/LoggerChunkProgressListener]: Preparing spawn area: 0%
[10:53:39] [Server thread/INFO] [minecraft/LoggerChunkProgressListener]: Time elapsed: 1155 ms
[10:53:39] [Server thread/INFO] [minecraft/DedicatedServer]: Done (1.531s)! For help, type "help"
[10:53:39] [LanServerPinger #1/WARN] [minecraft/LanServerPinger]: LanServerPinger: Network is unreachable
[10:53:39] [Server thread/INFO] [ne.ne.ne.se.pe.PermissionAPI/]: Successfully initialized permission handler neoforge:default_handler

[Gaming32]

Client mixins should probably go under the "client" array in the mixins.json. Though this causes no worse than a warning, it should still be fixed.