Doesn't work in singleplayer

[Traktool]

Hi!

Thank's for your mod, but it work only on server

I've this error if I put it in singleplayer :

2026-01-16 23:07:58.0827|WARN||ERROR - 	at java.base/java.util.ServiceLoader.fail(Unknown Source) 
2026-01-16 23:07:58.0827|WARN||ERROR - 	at java.base/java.util.ServiceLoader$ProviderImpl.newInstance(Unknown Source) 
2026-01-16 23:07:58.0827|WARN||ERROR - 	at java.base/java.util.ServiceLoader$ProviderImpl.get(Unknown Source) 
2026-01-16 23:07:58.0827|WARN||ERROR - 	at java.base/java.util.ServiceLoader$2.next(Unknown Source) 
2026-01-16 23:07:58.0827|WARN||ERROR - 	at com.hypixel.hytale.plugin.early.EarlyPluginLoader.loadEarlyPlugins(EarlyPluginLoader.java:72) 
2026-01-16 23:07:58.0827|WARN||ERROR - 	at com.hypixel.hytale.Main.main(Main.java:36) 
2026-01-16 23:07:58.0827|WARN||ERROR - Caused by: java.lang.IllegalArgumentException: Can not load plugins from 'D:\Games\Hytale\Hytale Game\UserData\Saves\New World\.\earlyplugins'. It is not a directory! 
2026-01-16 23:07:58.0827|WARN||ERROR - 	at com.build_9.hyxin.scanner.PluginScanner.scanDirectory(PluginScanner.java:35) 
2026-01-16 23:07:58.0827|WARN||ERROR - 	at com.build_9.hyxin.HyxinTransformer.<init>(HyxinTransformer.java:39) 
2026-01-16 23:07:58.0827|WARN||ERROR - 	at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(Unknown Source) 
2026-01-16 23:07:58.0827|WARN||ERROR - 	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Unknown Source) 
2026-01-16 23:07:58.0827|WARN||ERROR - 	at java.base/java.lang.reflect.Constructor.newInstance(Unknown Source) 
2026-01-16 23:07:58.0827|WARN||ERROR - 	... 5 more```

[Traktool]

In com.build_9.hyxin.HyxinTransformer, juste change this code :
plugins.scanDirectory(new File("earlyplugins"));

By this code :

File dir;
        try {
            dir = new File(HyxinTransformer.class.getProtectionDomain().getCodeSource().getLocation().toURI()).getParentFile();
        } catch (Exception e) {
            dir = new File(".");
        }

        if (dir != null && dir.isDirectory()) {
            Constants.log("Scanning early plugins from: " + dir.getAbsolutePath());
            plugins.scanDirectory(dir);
        } else {
            Constants.log("Cannot determine plugin directory for scanning: " + (dir == null ? "null" : dir.getAbsolutePath()));
        }

This fix the issue!

[DonovanDMC]

Getting this same issue,

026-01-24 21:10:36.7112|WARN||ERROR - Caused by: java.lang.IllegalArgumentException: Can not load plugins from '/home/donovan/.var/app/com.hypixel.HytaleLauncher/data/Hytale/UserData/Saves/temporary/./earlyplugins'. It is not a directory! 

Despite the mod's cf page claiming the earlyplugins folder needs to be within the save folder, hytale loads early plugins from UserData/EarlyPlugins

2026-01-24 21:09:10.2532|INFO||Starting server: /home/donovan/.var/app/com.hypixel.HytaleLauncher/data/Hytale/install/release/package/jre/latest/bin/java -Xms768M -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompactObjectHeaders -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational -XX:+UnlockExperimentalVMOptions -XX:ShenandoahUncommitDelay=30000 -XX:ShenandoahGuaranteedGCInterval=15000 -XX:ShenandoahGuaranteedOldGCInterval=30000 -XX:ShenandoahGuaranteedYoungGCInterval=15000 -XX:AOTCache="/home/donovan/.var/app/com.hypixel.HytaleLauncher/data/Hytale/install/release/package/game/latest/Server/HytaleServer.aot" -jar "/home/donovan/.var/app/com.hypixel.HytaleLauncher/data/Hytale/install/release/package/game/latest/Server/HytaleServer.jar" --client-pid 174 --bind localhost:47380 --assets="/home/donovan/.var/app/com.hypixel.HytaleLauncher/data/Hytale/install/release/package/game/latest/Assets.zip" --mods="/home/donovan/.var/app/com.hypixel.HytaleLauncher/data/Hytale/UserData/Mods" --singleplayer --owner-uuid="82bb1906-6c44-4b39-9c98-cb1005751e29" --owner-name="Donovan_DMC" --session-token="[REDACTED]" --identity-token="[REDACTED]" --auth-mode=authenticated --backup --backup-frequency=30 --backup-dir="/home/donovan/.var/app/com.hypixel.HytaleLauncher/data/Hytale/UserData/Saves/temporary/backup" --prefab-cache="/home/donovan/.var/app/com.hypixel.HytaleLauncher/data/Hytale/UserData/PrefabCache" --early-plugins="/home/donovan/.var/app/com.hypixel.HytaleLauncher/data/Hytale/UserData/EarlyPlugins" (note the end)

I only have the linux version with flatpak, so for all I know this could be different for other operating systems

Note also that most linux filesystems are case sensitive, so it NEEDS to be EarlyPlugins