مشکل Gradle در یونیتی و اندروید استدیو

درود آقا من تقریبا همین ارر.ر را داترم که در زیر اررور اصلی را می گذارم
و نمی توانم در یونیتی و در حالت gradle خروجی بگیرم در اندروید استدیو هم گریدل سینک می شود و فقط قسمت آخر آن که resolve…. است سینک نمی شود و دقیقا همان اروری که ر یونیتی است و ددر زیر می گذارم را نشان می دهم آیا این اررور ربطی به sdk دارد ون شخصی با مبلغ بالا می خواه sdk به من بفروشد و می گوید مشکل حل میشود یا نه به گریدل ربط دارد ؟؟

من چطور این اررور را برطرف کنم هر چه سریعتر کمک کنید سه ماه است درگیرش هستم

    CommandInvokationFailure: Gradle build failed. C:/Program Files/Java/jdk1.8.0_192\bin\java.exe -classpath "F:\files\pc\Video\artoon\program files\UnitySetup64-2017.4.17f1\Unity\Editor\Data\PlaybackEngines\AndroidPlayer\Tools\gradle\lib\gradle-launcher-4.6.jar" org.gradle.launcher.GradleMain "-Dorg.gradle.jvmargs=-Xmx4096m" "bundleRelease"
 
stderr[
 
FAILURE: Build failed with an exception.
 
* What went wrong:
A problem occurred configuring root project 'gradleOut'.
> Could not resolve all artifacts for configuration ':classpath'.
   > Could not resolve com.android.tools.build:gradle:2.3.0.
     Required by:
         project :
      > Could not resolve com.android.tools.build:gradle:2.3.0.
         > Could not get resource 'https://jcenter.bintray.com/com/android/tools/build/gradle/2.3.0/gradle-2.3.0.pom'.
            > Could not HEAD 'https://jcenter.bintray.com/com/android/tools/build/gradle/2.3.0/gradle-2.3.0.pom'.
               > jcenter.bintray.com
 
* 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
 
BUILD FAILED in 32s
]
stdout[
Starting a Gradle Daemon (subsequent builds will be faster)
]
exit code: 1
UnityEditor.Android.Command.WaitForProgramToRun (UnityEditor.Utils.Program p, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
UnityEditor.Android.AndroidJavaTools.RunJava (System.String args, System.String workingdir, System.Action`1 progress, System.String error)
UnityEditor.Android.GradleWrapper.Run (System.String workingdir, System.String task, System.Action`1 progress)
Rethrow as GradleInvokationException: Gradle build failed
UnityEditor.Android.GradleWrapper.Run (System.String workingdir, System.String task, System.Action`1 progress)
UnityEditor.Android.PostProcessor.Tasks.BuildGradleProject.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context)
UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
 
 
Build completed with a result of 'Failed'
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
 
UnityEditor.BuildPlayerWindow+BuildMethodException: 2 errors
  at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (BuildPlayerOptions options) [0x0020e] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:181
  at UnityEditor.BuildPlayerWindow.CallBuildMethods (Boolean askForBuildLocation, BuildOptions defaultBuildOptions) [0x00065] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:88
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
 
 
     CommandInvokationFailure: Gradle build failed. C:/Program Files/Java/jdk1.8.0_192\bin\java.exe -classpath "F:\files\pc\Video\artoon\program files\UnitySetup64-2017.4.17f1\Unity\Editor\Data\PlaybackEngines\AndroidPlayer\Tools\gradle\lib\gradle-launcher-4.6.jar" org.gradle.launcher.GradleMain "-Dorg.gradle.jvmargs=-Xmx4096m" "bundleRelease"
 
stderr[
 
FAILURE: Build failed with an exception.
 
        Could not resolve all artifacts for configuration ':classpath'. Could not resolve com.android.tools.build:gradle:2.3.0.
 
    Required by: project : > Could not resolve com.android.tools.build:gradle:2.3.0. > Could not get resource 'https://jcenter.bintray.com/com/android/tools/build/gradle/2.3.0/gradle-2.3.0.pom'. > Could not HEAD 'https://jcenter.bintray.com/com/android/tools/build/gradle/2.3.0/gradle-2.3.0.pom'. > jcenter.bintray.com
 
    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
 
BUILD FAILED in 32s ] stdout[ Starting a Gradle Daemon (subsequent builds will be faster) ] exit code: 1 UnityEditor.Android.Command.WaitForProgramToRun (UnityEditor.Utils.Program p, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) UnityEditor.Android.AndroidJavaTools.RunJava (System.String args, System.String workingdir, System.Action`1 progress, System.String error) UnityEditor.Android.GradleWrapper.Run (System.String workingdir, System.String task, System.Action`1 progress) Rethrow as GradleInvokationException: Gradle build failed UnityEditor.Android.GradleWrapper.Run (System.String workingdir, System.String task, System.Action`1 progress) UnityEditor.Android.PostProcessor.Tasks.BuildGradleProject.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
 
Build completed with a result of 'Failed' UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
 
UnityEditor.BuildPlayerWindow+BuildMethodException: 2 errors at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (BuildPlayerOptions options) [0x0020e] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:181 at UnityEditor.BuildPlayerWindow.CallBuildMethods (Boolean askForBuildLocation, BuildOptions defaultBuildOptions) [0x00065] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:88 UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

شخصی به من گفته با مبلغ بالا می توان اس دی کی به من بفروشد آیا با خری اس دی کی مشکلم حل میشود ؟ من خودم رنزدیک 230گیگ چند بار از طریق اندروید استدیو دانلود کردم حالا چکار کنم بخرم یا اصلا به اس دی کی مربوط نمیشه؟ طور مشکلم را برطرف کنم
لطفا کمک کنید خیلی احتیاج ددارم
سه ماه است حتی از خارجی ها هم کمک گرفتم اما کسی نتوانست مشکل را حل کندد و مشکلات ما ایرانی ها شاید مشکلات خاصی باشد که آنها اطلاعی از آن ندارند
به هر حال من اندروید استدیو خیلی بلد نیستم بنابراین با زبانی ساده کمک کنید