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    • So I was trying to open the server file on my mac with 8GB RAM. This is the file I was using  #!/bin/bash export JAVA_HOME=$(/usr/libexec/java_home -v 13.0.2) cd "$(dirname "$0")" exec Java -Xms8G -Xmx8G -jar server.jar   when I open this I get this error A problem occurred running the Server launcher.java.lang.reflect.InvocationTargetException at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:567) at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:70) at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:34) Caused by: java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$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.<init>(Launch.java:34) at net.minecraft.launchwrapper.Launch.main(Launch.java:28) ... 6 more logout Saving session... ...copying shared history... ...saving history...truncating history files... ...completed.   [Process completed]     The server opens fine with just the java file.
    • 1.12 is no longer supported on these forums due to age. Please update to a modern version to receive support here.   More information on supported versions can be found in the LTS link at the top of every page.
    • I have a remote system that I RDP(Remote Desktop Protocol) to in order to host my server. The server is on a completely separate network with the business plan from my ISP. Previously the server was able to host modded server fine, but recently when I started hosting new modpacks on the server, I have been experiencing issues connecting to the server myself. All the other players on my server can connect without issues, however when I connect, I am able to play for a few seconds before I get timed out. The server logs also start spamming: I have tried running older modpacks or vanilla and did not experience this issue. I also suspected this may have been a modpack issue, so I tried another mod which resulted in the same error. Any help or suggestion is appreciated :)  
    • 1.12 is no longer supported on these forums due to age. Please update to a modern version if you wish to receive support here.   More information on supported versions can be found in the LTS link at the top of every page.
    • I looked at another tutorial and found out that I use JRE and not JDK so I don't know anything about it but thanks for your help.
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