Cannot start for the first time

[Bottinator22]

I'm trying to get into modding, and when I try to run the game, it throws this error:
 

[18:44:01] [main/ERROR] [LaunchWrapper]: Unable to launch
java.lang.reflect.InvocationTargetException: null
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_242]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_242]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_242]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_242]
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_242]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_242]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_242]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_242]
	at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]
	at GradleStart.main(GradleStart.java:25) [start/:?]
Caused by: java.lang.ExceptionInInitializerError
	at org.lwjgl.LinuxSysImplementation.<clinit>(LinuxSysImplementation.java:50) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
	at org.lwjgl.Sys.createImplementation(Sys.java:131) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
	at org.lwjgl.Sys.<clinit>(Sys.java:116) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
	at net.minecraft.client.Minecraft.getSystemTime(Minecraft.java:3158) ~[Minecraft.class:?]
	at net.minecraft.client.main.Main.main(Main.java:42) ~[Main.class:?]
	... 12 more
Caused by: java.lang.NullPointerException
	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1847) ~[?:1.8.0_242]
	at java.lang.Runtime.loadLibrary0(Runtime.java:871) ~[?:1.8.0_242]
	at java.lang.System.loadLibrary(System.java:1124) ~[?:1.8.0_242]
	at java.awt.Toolkit$3.run(Toolkit.java:1636) ~[?:1.8.0_242]
	at java.awt.Toolkit$3.run(Toolkit.java:1634) ~[?:1.8.0_242]
	at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_242]
	at java.awt.Toolkit.loadLibraries(Toolkit.java:1633) ~[?:1.8.0_242]
	at java.awt.Toolkit.<clinit>(Toolkit.java:1670) ~[?:1.8.0_242]
	at org.lwjgl.LinuxSysImplementation.<clinit>(LinuxSysImplementation.java:50) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
	at org.lwjgl.Sys.createImplementation(Sys.java:131) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
	at org.lwjgl.Sys.<clinit>(Sys.java:116) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
	at net.minecraft.client.Minecraft.getSystemTime(Minecraft.java:3158) ~[Minecraft.class:?]
	at net.minecraft.client.main.Main.main(Main.java:42) ~[Main.class:?]
	... 12 more
Exception in thread "main" [18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: java.lang.reflect.InvocationTargetException
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: 	at java.lang.reflect.Method.invoke(Method.java:498)
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: 	at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: 	at GradleStart.main(GradleStart.java:25)
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: Caused by: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: 	at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: 	at java.lang.SecurityManager.checkExit(SecurityManager.java:761)
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: 	at java.lang.Runtime.exit(Runtime.java:108)
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: 	at java.lang.System.exit(System.java:973)
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: 	at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: 	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[18:44:01] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: 	... 6 more

Using this tutorial: https://codakid.com/guide-to-minecraft-modding-with-java/

Using Kubuntu 18.04.3
(Kubuntu is like Ubuntu but with a different desktop)

[DaemonUmbra]

1.12 is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.