Problem in Build LB legacy

[lol_ I_know_that_you_see_this]

crash
[21:42:05] [main/INFO]: Extra: []
[21:42:05] [main/INFO]: Running with arguments: [--userProperties, {}, --assetsDir, /home/goose/.gradle/caches/minecraft/assets, --assetIndex, 1.8, --accessToken{REDACTED}, --version, 1.8.9, --tweakClass, net.minecraftforge.fml.common.launcher.FMLTweaker, --tweakClass, net.minecraftforge.gradle.tweakers.CoremodTweaker]
[21:42:05] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[21:42:05] [main/ERROR]: Unable to launch
java.lang.ClassNotFoundException: net.minecraftforge.fml.common.launcher.FMLTweaker
at java.net.URLClassLoader.findClass(URLClassLoader.java:387) ~[?:1.8.0_332]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_332]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352) ~[?:1.8.0_332]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_332]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:106) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_332]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_332]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_332]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_332]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:98) [launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_332]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_332]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_332]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_332]
at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]
at GradleStart.main(GradleStart.java:26) [start/:?]

Process finished with exit code 1

PLS help me

[Ali00035]

@lol_-i_know_that_you_see_this Did you use git properly?

[lol_ I_know_that_you_see_this]

@ali00035 yes, I did (git clone https://github.com/CCBlueX/LiquidBounce/ first, then put all new files in original directory, then git checkout legacy and gradlew --debug setupDevWorkspace idea genIntellijRuns build and in run configuration )