Bug Description

<A problem occurred running the Server launcher.java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:110)
at java.base/java.lang.reflect.Method.invoke(Method.java:577)
at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:70)
at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:34)
Caused by: java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')
at net.minecraft.launchwrapper.Launch.(Launch.java:34)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
... 3 more

Did this behavior use to work in the previous version?

• Client/Server Log:<[19:14:55] [Server thread/INFO]: Starting minecraft server version 1.12.2
  [19:14:55] [Server thread/INFO]: Loading properties
  [19:14:55] [Server console handler/ERROR]: Exception handling console input
  java.io.IOException: Controlador no válido
  at java.io.FileInputStream.readBytes(Native Method) ~[?:?]
  at java.io.FileInputStream.read(FileInputStream.java:276) ~[?:?]
  at java.io.BufferedInputStream.read1(BufferedInputStream.java:282) ~[?:?]
  at java.io.BufferedInputStream.read(BufferedInputStream.java:343) ~[?:?]
  at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:270) ~[?:?]
  at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:313) ~[?:?]
  at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:188) ~[?:?]
  at java.io.InputStreamReader.read(InputStreamReader.java:176) ~[?:?]
  at java.io.BufferedReader.fill(BufferedReader.java:162) ~[?:?]
  at java.io.BufferedReader.readLine(BufferedReader.java:329) ~[?:?]
  at java.io.BufferedReader.readLine(BufferedReader.java:396) ~[?:?]
  at nz$2.run(SourceFile:100) [minecraft_server.1.12.2.jar:?]
  [19:14:55] [Server thread/INFO]: Default game type: SURVIVAL
  [19:14:55] [Server thread/INFO]: Generating keypair
  [19:14:56] [Server thread/INFO]: Starting Minecraft server on *:25565
  [19:14:56] [Server thread/INFO]: Using default channel type
  [19:14:56] [Server thread/INFO]: Preparing level "world"
  [19:14:56] [Server thread/INFO]: Loaded 488 advancements
  [19:14:56] [Server thread/INFO]: Preparing start region for level 0
  [19:14:57] [Server thread/INFO]: Preparing spawn area: 45%
  [19:14:58] [Server thread/INFO]: Preparing spawn area: 52%
  [19:14:59] [Server thread/INFO]: Preparing spawn area: 67%
  [19:15:00] [Server thread/INFO]: Preparing spawn area: 84%
  [19:15:01] [Server thread/INFO]: Done (5,309s)! For help, type "help" or "?"
  [19:15:02] [Server thread/INFO]: Stopping server
  [19:15:02] [Server thread/INFO]: Saving players
  [19:15:02] [Server thread/INFO]: Saving worlds
  [19:15:02] [Server thread/INFO]: Saving chunks for level 'world'/overworld
  [19:15:03] [Server Shutdown Thread/INFO]: Stopping server

Client Information

• Modpack Version:<!3.2.3>
• Java Version:<8>
• Launcher Used:<N/A>
• Memory Allocated:<4 GB>
• Server/LAN/Single Player:
• Optifine Installed:
• Shaders Enabled:

World Information

• Modpack Version world created in:<3.2.3>
• Additional Content Installed:

Server Information

• Java Version:
• Operating System:
• Hoster/Hosting Solution:
• Sponge (Non-Vanilla Forge) Server:

You seem to have attached two different logs; in the first you're using an unsupported version of Java. You must use Java 8 with forge for 1.12.2.

In the second log, you're launching a vanilla server, probably as you've double clicked minecraft_server.1.12.2.jar instead of the start script.

You should remove the world folder and ensure Java 8 (64-bit) is installed and set as your default before running the start script again.

If you cannot make Java 8 your default for whatever reason you can modify the start script to force the use of Java 8 by using its absolute path.

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