net.minecraftforge.userdev.LaunchTesting not found. How to fix (1.15.2)

[MinMag]

Hello everyone,

i try to learn modding and have made the setup. Now, when i try to run the code it crashes. How can i fix this? It says 

Quote

net.minecraftforge.userdev.LaunchTesting not found

 

Edited April 10, 2022 by MinMag
Forgot something

[MinMag]

Here is the full Error:

Quote

C:\Users\name\.jdks\corretto-1.8.0_322\bin\java.exe -Dforge.logging.console.level=debug -Dforge.logging.markers=SCAN,REGISTRIES,REGISTRYDUMP -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump "-Dos.name=Windows 10" -Dos.version=10.0 "-javaagent:D:\name\Programming\IDEs\IntelliJ IDEA Community Edition 2021.3.3\lib\idea_rt.jar=55712:D:\name\Programming\IDEs\IntelliJ IDEA Community Edition 2021.3.3\bin" -Dfile.encoding=UTF-8 -classpath C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\charsets.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\ext\access-bridge-64.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\ext\cldrdata.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\ext\dnsns.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\ext\jaccess.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\ext\jfxrt.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\ext\localedata.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\ext\nashorn.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\ext\sunec.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\ext\sunjce_provider.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\ext\sunmscapi.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\ext\sunpkcs11.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\ext\zipfs.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\jce.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\jfr.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\jfxswt.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\jsse.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\management-agent.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\resources.jar;C:\Users\name\.jdks\corretto-1.8.0_322\jre\lib\rt.jar net.minecraftforge.userdev.LaunchTesting
Fehler: Hauptklasse net.minecraftforge.userdev.LaunchTesting konnte nicht gefunden oder geladen werden

Process finished with exit code 1