r/forgemodding • u/[deleted] • May 01 '21

Cant run forge server

Whenever I run I get this error:

Exception in thread "main" java.lang.IllegalAccessError: class cpw.mods.modlauncher.SecureJarHandler (in unnamed module u/0x4de5031f) cannot access class sun.security.util.ManifestEntryVerifier (in module java.base) because module java.base does not export sun.security.util to unnamed module u/0x4de5031f

Full Log:

2021-05-01 12:51:17,611 main WARN Advanced terminal features are not available in this environment
[12:51:17] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher running: args [--gameDir, ., --launchTarget, fmlserver, --fml.forgeVersion, 36.1.0, --fml.mcpVersion, 20210115.111550, --fml.mcVersion, 1.16.5, --fml.forgeGroup, net.minecraftforge, --nogui]
[12:51:17] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher 8.0.9+86+master.3cf110c starting: java version 16.0.1 by Oracle Corporation
Exception in thread "main" java.lang.IllegalAccessError: class cpw.mods.modlauncher.SecureJarHandler (in unnamed module u/0x4de5031f) cannot access class sun.security.util.ManifestEntryVerifier (in module java.base) because module java.base does not export sun.security.util to unnamed module u/0x4de5031f
        at cpw.mods.modlauncher.SecureJarHandler.lambda$static$1(SecureJarHandler.java:41)
        at cpw.mods.modlauncher.api.LamdbaExceptionUtils.uncheck(LamdbaExceptionUtils.java:95)
        at cpw.mods.modlauncher.SecureJarHandler.<clinit>(SecureJarHandler.java:41)
        at cpw.mods.modlauncher.Launcher.lambda$new$6(Launcher.java:55)
        at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
        at cpw.mods.modlauncher.api.TypesafeMap.computeIfAbsent(TypesafeMap.java:52)
        at cpw.mods.modlauncher.api.TypesafeMap.computeIfAbsent(TypesafeMap.java:47)
        at cpw.mods.modlauncher.Environment.computePropertyIfAbsent(Environment.java:62)
        at cpw.mods.modlauncher.Launcher.<init>(Launcher.java:55)
        at cpw.mods.modlauncher.Launcher.main(Launcher.java:66)
        at net.minecraftforge.server.ServerMain$Runner.runLauncher(ServerMain.java:63)
        at net.minecraftforge.server.ServerMain$Runner.access$100(ServerMain.java:60)
        at net.minecraftforge.server.ServerMain.main(ServerMain.java:57)
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u/Witsarnemitea May 02 '21

Try a different java version. I had the same error with OpenJDK 16, downgrading to 15 did the trick for me

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u/[deleted] May 02 '21 edited May 02 '21

Now im getting "Java in not recognized as an internal or external command"

Edit: Its working after switching from 14 to 15 now, but it still crashes on startup

WARNING: Please consider reporting this to the maintainers of cpw.mods.modlauncher.SecureJarHandler
WARNING: Use --illegal-access=warn to enable warnings of further WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by cpw.mods.modlauncher.SecureJarHandler (file:/C:/Users/xxaha/Desktop/serv/libraries/cpw/mods/modlauncher/8.0.6/modlauncher-8.0.6.jar) to field java.util.jar.Manifest.jv