I have a error when gradlew setupDecompWorkspace

[Yunus Emre]

To honour the JVM settings for this build a new JVM will be forked. Please consider using the daemon: https://docs.gradle.org/4.9/userguide/gradle_daemon.html.minecraft.net/30/30fcb7e37b33af69fbb03299ba16aaf426fef884 Asset: minecraft/lang/e
Daemon will be stopped at the end of the build stopping after processing

> Configure project :
New Dep: net.minecraftforge:forge:1.12.2-14.23.5.2854_mapped_snapshot_20171003-1.124ca29cb26240e Asset: minecraft/lang/e

FAILURE: Build failed with an exception.
s_cl.lang
* What went wrong://resources.download.minecraft.net/50/504d4e4b5572743945091b683eba597d8e6b5f4d Asset: minecraft/lang/e
Task 'setupDecompWorkspace' not found in root project '1.12.2 mod from yunus'.
Downloading: http://resources.download.minecraft.net/97/97b93f972dc2f293894d9d832cefbe6a7be0bbf1 Asset: minecraft/lang/e
* Try:ang
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
Downloading: https://launchermeta.mojang.com/v1/packages/1584b57c1a0b5e593fad1f5b8f78536ca640547b/1.12.json
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.bb2ccd289cc7a9842585af2fb28 Asset: minecraft/lang/e
See https://docs.gradle.org/4.9/userguide/command_line_interface.html#sec:command_line_warnings
Downloading: http://resources.download.minecraft.net/da/dac5b4bed730fac5085e95fd026638fd9df3e85d Asset: minecraft/lang/e
BU¦LD FAILED in 13s

 

I have this error when i write gradlew setupDecompWorkspace

 

 

[Yunus1903]

1.12 is no longer supported on this forum.
Please update to a more modern version of Minecraft (1.14+) to receive support.

 

 

[Yunus Emre]

I switched to 1.15.2 but i am still having this error

 

[Danebi]

I hope that i'm not wrong but the task 'setupDecompWorkspace' no longer exists from forge 1.12.2

[Yunus Emre]

ok, but how can i fix this in 1.12.2 or 1.15.2?

Edited July 19, 2020 by Yunus Emre

[DaemonUmbra]

The only "error" you've shown is your knowledge of Mod Dev being out of date, and I'm hesitant to help you as you seem to be targeting a version we no longer provide support for.