Server Crashed when forge started to load

[BlueStarrySky]

Exception in thread "main" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:39)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.run(Launcher.java:106)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.main(Launcher.java:77)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23)
    at [email protected]/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:149)
Caused by: java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.targets.CommonServerLaunchHandler.lambda$launchService$0(CommonServerLaunchHandler.java:32)
    at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37)
    ... 7 more
Caused by: java.awt.AWTError: Can't connect to X11 window server using 'localhost:10.0' as the value of the DISPLAY variable.
    at java.desktop/sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
    at java.desktop/sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:101)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
    at java.desktop/sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:60)
    at java.desktop/sun.awt.PlatformGraphicsInfo.createGE(PlatformGraphicsInfo.java:36)
    at java.desktop/java.awt.GraphicsEnvironment$LocalGE.createGE(GraphicsEnvironment.java:93)
    at java.desktop/java.awt.GraphicsEnvironment$LocalGE.<clinit>(GraphicsEnvironment.java:84)
    at java.desktop/java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:106)
    at java.desktop/sun.awt.X11.XToolkit.<clinit>(XToolkit.java:224)
    at java.desktop/sun.awt.PlatformGraphicsInfo.createToolkit(PlatformGraphicsInfo.java:40)
    at java.desktop/java.awt.Toolkit.getDefaultToolkit(Toolkit.java:599)
    at java.desktop/javax.swing.UIManager.getSystemLookAndFeelClassName(UIManager.java:668)
    at TRANSFORMER/[email protected]/net.minecraft.server.gui.MinecraftServerGui.m_139921_(MinecraftServerGui.java:47)
    at TRANSFORMER/[email protected]/net.minecraft.server.dedicated.DedicatedServer.m_139667_(DedicatedServer.java:380)
    at TRANSFORMER/[email protected]/net.minecraft.server.Main.lambda$main$5(Main.java:217)
    at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_129872_(MinecraftServer.java:270)
    at TRANSFORMER/[email protected]/net.minecraft.server.Main.main(Main.java:201)
    ... 13 more

[warjort]

You don't have X11 available so it can't display the GUI.

Start the server with the nogui option. It goes after where you have "java -jar forge-xxx.jar"