im trying to learn to make mod. But when i trying genSources it return error.

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'DogMeat'.
> Could not resolve all files for configuration ':_compileJava_1'.
   > Could not find net.minecraft:client:1.16.5.
     Searched in the following locations:
       - https://maven.minecraftforge.net/net/minecraft/client/1.16.5/client-1.16.5.module
       - https://maven.minecraftforge.net/net/minecraft/client/1.16.5/client-1.16.5.pom
       - https://maven.minecraftforge.net/net/minecraft/client/1.16.5/client-1.16.5-extra.jar
       - file:/C:/Users/vinhp/.gradle/caches/forge_gradle/bundeled_repo/net/minecraft/client/1.16.5/client-1.16.5.pom
       - file:/C:/Users/vinhp/.gradle/caches/forge_gradle/bundeled_repo/net/minecraft/client/1.16.5/client-1.16.5-extra.jar
       - https://libraries.minecraft.net/net/minecraft/client/1.16.5/client-1.16.5-extra.jar
       - https://repo.maven.apache.org/maven2/net/minecraft/client/1.16.5/client-1.16.5.pom
     Required by:
         project :

* Try:
> 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 8.0.

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

See https://docs.gradle.org/7.3.3/userguide/command_line_interface.html#sec:command_line_warnings

BUILD FAILED in 21s
<-------------> 0% WAITING
> IDLE

Can someone help me?

The version you are using is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.

Currently supported versions are 1.19 (Latest) and 1.18.2 (LTS).