[19:31:34] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher running: args [--gameDir, ., --launchTarget, fmlserver, --fml.forgeVersion, 36.2.26, --fml.mcpVersion, 20210
115.111550, --fml.mcVersion, 1.16.5, --fml.forgeGroup, net.minecraftforge]                                                                                                       
[19:31:34] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher 8.1.3+8.1.3+main-8.1.x.c94d18ec starting: java version 16.0.2 by Oracle Corporation                          
Exception in thread "main" java.lang.IllegalAccessError: class cpw.mods.modlauncher.SecureJarHandler (in unnamed module @0x3330b662) cannot access class sun.security.util.Manif
estEntryVerifier (in module java.base) because module java.base does not export sun.security.util to unnamed module @0x3330b662
       at cpw.mods.modlauncher.SecureJarHandler.lambda$static$1(SecureJarHandler.java:45)
       at cpw.mods.modlauncher.api.LamdbaExceptionUtils.uncheck(LamdbaExceptionUtils.java:95)
       at cpw.mods.modlauncher.SecureJarHandler.<clinit>(SecureJarHandler.java:45)
       at cpw.mods.modlauncher.Launcher.lambda$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)

Using Java 16 on Ubuntu. On first time startup I get this error. Any help would be greatly appreciated.

update Forge to the latest version, also note 1.16 requires java 8