ViaticShadow

I got it on the oracle website.

Thanks a ton! It worked!

Thanks I'll try it.

As for the first problem, probably just paste the first word all the way to as far as it will let you. For the second, your friend's.

You can copy and paste the text within it. (Or just the relevant bits). As for the client log, do Windows+R, and type in "%appdata%\.minecraft\logs".

FIX: As suggested, I downgraded my java 8 to version 311 b11. Now I can run forge servers! Problem: Whenever I run the forge jar (Be it through double click, open with java, cmd, or a start.bat file) I get the same error. I am using java 1.8.0_321 build 07, my java server build hotspot is build 25.321-b07 mixed mode, and forge 1.16.5-36.2.20. I am using a 64 bit operating system if it matters. Here's the log: Exception in thread "main" [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: java.lang.NoSuchMethodError: sun.security.util.ManifestEntryVerifier.<init>(Ljava/util/jar/Manifest;)V [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at cpw.mods.modlauncher.SecureJarHandler.createCodeSource(SecureJarHandler.java:66) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at cpw.mods.modlauncher.TransformingClassLoader$DelegatedClassLoader.findClass(TransformingClassLoader.java:275) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:136) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:98) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at java.lang.ClassLoader.loadClass(Unknown Source) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at java.lang.Class.forName0(Native Method) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at java.lang.Class.forName(Unknown Source) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at net.minecraftforge.fml.loading.FMLServerLaunchProvider.lambda$launchService$0(FMLServerLaunchProvider.java:51) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at net.minecraftforge.server.ServerMain$Runner.runLauncher(ServerMain.java:63) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at net.minecraftforge.server.ServerMain$Runner.access$100(ServerMain.java:60) [08:48:33] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:-1]: at net.minecraftforge.server.ServerMain.main(ServerMain.java:57) I've been searching around on forum posts, asking friends, testing things, and nothing works. Some things I've tried: Switching java version. Adding forge recommended java 16 args despite not running java 16. My friends suggestion of running a totally random sequence of forge and minecraft jars. Running everything through cmd. Running everything through a start.bat file. Please help. I no about nothing about java and this sun.security thing. I just want to play valhelsia 3 with my friends. You can reply to the thread, or message me on discord (ViaticShadow#3453) and I'll update the post accordingly to aid anyone else who encounters this problem. Thanks in advance.