I cant finish downloading Gradle

[Snack0815]

Hey guys, Im new in the mod scene and i've got a tip to install Gradle. I have Java 11 and ide eclipse. I've also set the variables "JAVA_HOME" and "PATH" for Java. After that i've started the command "gradlew setupDecompWorkspace eclipse" in cmd. It all worked and it installe folders in the path, but later in the installiation there came an Failure:

 

FAILURE: Build failed with an exception.

* What went wrong:
Task 'setupDecompWorkspace' not found in root project 'Projekt'.

* Try:
Run gradlew tasks to get a list of available tasks. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

Deprecated Gradle features were used in this build, making it incompatible with Gradle 5.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/4.9/userguide/command_line_interface.html#sec:command_line_warnings

BUILD FAILED in 8s
 

I've done a lot of research but i didn't find any solution for this. 

 

Now my question is: Can someone help me with this problem?

[Snack0815]

but how do i import the projekt in ide eclipse. I tried it but when i import the folder it doesnt show up in the projekt manager

 

Can you add me on discord so i can send you pictures and vids from this i really need your help

Discord: Jakob#7144