forgeserver.jar not opening

[Kardy]

I have been trying for 3 hours now to create a modded minecraft server and I have followed countless youtube videos however it seems to go wrong at the same point every time.

whenever i try to run the forgeserver.jar file nothing happens and when i try to run it through a run.bat file it opens the command prompt then throws errors at me this is what it says if it helps at all

one final thing i tried making a vanilla server and I got it working in 10 minutes so i dont know what the problem is, if anyone can help i would be so thankful :)

C:\Users\ryanm\Desktop\valserver>java -Xmx4096M -Xms4096M -jar forgeserver.jar nogui
2021-06-21 15:39:17,097 main WARN Advanced terminal features are not available in this environment
[15:39:17] [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]
[15:39:17] [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 @0xca263c2) cannot access class sun.security.util.ManifestEntryVerifier (in module java.base) because module java.base does not export sun.security.util to unnamed module @0xca263c2
        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)

C:\Users\ryanm\Desktop\valserver>PAUSE
Press any key to continue . . .

[DaemonUmbra]

1.16 is not currently supported, use Java 8-15

[Kardy]

so I need to use java 15 does that mean i can only use minecraft versions 1.15 and below or how does it work? because my modpack is 1.16 is there any way for me to play with it or is it broken right now