Hello,
Sorry @diesieben07 for considering the few versions I tested as "all versions not working". I just tried starting a server on 1.16.4 and it gave me a different error. I'd like to be able to fix this issue with running a server of any version, but for mods compatibility, I'm using some of the older versions of Forge, however the issue relates between all of them.
Here is the new log of 1.16.4:
[08led2021 15:46:22.748] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--gameDir, ., --launchTarget, fmlserver, --fml.forgeVersion, 35.1.4, --fml.mcpVersion, 20201102.104115, --fml.mcVersion, 1.16.4, --fml.forgeGroup, net.minecraftforge]
[08led2021 15:46:22.753] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 8.0.6+85+master.325de55 starting: java version 15.0.1 by Oracle Corporation
[08led2021 15:46:23.096] [main/INFO] [net.minecraftforge.fml.loading.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[08led2021 15:46:23.161] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.2 Source=file:/C:/Users/pukavec/Desktop/1.16.4%20server/libraries/org/spongepowered/mixin/0.8.2/mixin-0.8.2.jar Service=ModLauncher Env=SERVER
[08led2021 15:46:23.211] [main/WARN] [net.minecraftforge.fml.loading.FMLConfig/CORE]: Configuration file C:\Users\pukavec\Desktop\1.16.4 server\config\fml.toml is not correct. Correcting
[08led2021 15:46:23.219] [main/WARN] [net.minecraftforge.fml.loading.FMLConfig/CORE]: Incorrect key [defaultConfigPath] was corrected from null to defaultconfigs
[08led2021 15:46:23.514] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: java.lang.NoClassDefFoundError: jdk/nashorn/api/scripting/NashornScriptEngineFactory
[08led2021 15:46:23.514] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at net.minecraftforge.coremod.CoreModEngine.loadCoreMod(CoreModEngine.java:48)
[08led2021 15:46:23.515] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at net.minecraftforge.coremod.CoreModProvider.addCoreMod(CoreModProvider.java:12)
[08led2021 15:46:23.515] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
[08led2021 15:46:23.516] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
[08led2021 15:46:23.517] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658)
[08led2021 15:46:23.517] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
[08led2021 15:46:23.518] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
[08led2021 15:46:23.518] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
[08led2021 15:46:23.519] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
[08led2021 15:46:23.519] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
[08led2021 15:46:23.520] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
[08led2021 15:46:23.520] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
[08led2021 15:46:23.520] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
[08led2021 15:46:23.521] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
[08led2021 15:46:23.522] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
[08led2021 15:46:23.525] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at net.minecraftforge.fml.loading.LoadingModList.addCoreMods(LoadingModList.java:85)
[08led2021 15:46:23.525] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer.discoverMods(ModDiscoverer.java:129)
[08led2021 15:46:23.526] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at net.minecraftforge.fml.loading.FMLLoader.beginModScan(FMLLoader.java:215)
[08led2021 15:46:23.526] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at net.minecraftforge.fml.loading.FMLServiceProvider.runScan(FMLServiceProvider.java:107)
[08led2021 15:46:23.527] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at cpw.mods.modlauncher.TransformationServiceDecorator.runScan(TransformationServiceDecorator.java:114)
[08led2021 15:46:23.527] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at cpw.mods.modlauncher.TransformationServicesHandler.lambda$runScanningTransformationServices$8(TransformationServicesHandler.java:115)
[08led2021 15:46:23.528] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:271)
[08led2021 15:46:23.528] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.HashMap$ValueSpliterator.forEachRemaining(HashMap.java:1766)
[08led2021 15:46:23.528] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
[08led2021 15:46:23.529] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
[08led2021 15:46:23.529] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
[08led2021 15:46:23.530] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
[08led2021 15:46:23.531] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
[08led2021 15:46:23.531] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at cpw.mods.modlauncher.TransformationServicesHandler.runScanningTransformationServices(TransformationServicesHandler.java:116)
[08led2021 15:46:23.532] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at cpw.mods.modlauncher.TransformationServicesHandler.initializeTransformationServices(TransformationServicesHandler.java:63)
[08led2021 15:46:23.535] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at cpw.mods.modlauncher.Launcher.run(Launcher.java:76)
[08led2021 15:46:23.544] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at cpw.mods.modlauncher.Launcher.main(Launcher.java:66)
[08led2021 15:46:23.545] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at net.minecraftforge.server.ServerMain$Runner.runLauncher(ServerMain.java:63)
[08led2021 15:46:23.545] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at net.minecraftforge.server.ServerMain$Runner.access$100(ServerMain.java:60)
[08led2021 15:46:23.546] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: at net.minecraftforge.server.ServerMain.main(ServerMain.java:57)
[08led2021 15:46:23.546] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1057]: Caused by: java.lang.ClassNotFoundException: jdk.nashorn.api.scripting.NashornScriptEngineFactory
[08led2021 15:46:23.547] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1057]: at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:606)
[08led2021 15:46:23.548] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1057]: at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:168)
[08led2021 15:46:23.548] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1057]: at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
[08led2021 15:46:23.548] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1057]: ... 35 more