مشکل در اجرای فلاتر

سلام دوستان در اجرای فلاتر به مشکل خوردم یعنی زمانی که مینویسم:
flutter run
با اررور مواجه میشم . از ******** هم استفاده میکنم ولی نمیدونم مشکل چیه
ممنون میشم کمک کنید (@hesammousavi)
متن ارور:

• Error running Gradle:
  ProcessException: Process "C:\Users\Hamrani\Desktop\flutterTest\aliflutter\android\gradlew.bat" exited abnormally:

FAILURE: Build failed with an exception.

• What went wrong:
  A problem occurred configuring root project 'android'.

  Could not resolve all artifacts for configuration ':classpath'.
  Could not resolve com.android.tools.build:gradle:3.2.1.
  Required by:
  project :
  Could not resolve com.android.tools.build:gradle:3.2.1.
  Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
  Could not GET 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
  Connect to 187.12.59.74:8080 [/187.12.59.74] failed: Connection timed out: connect
  Could not resolve com.android.tools.build:gradle:3.2.1.
  Could not get resource 'https://jcenter.bintray.com/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
  Could not GET 'https://jcenter.bintray.com/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
  Connect to 187.12.59.74:8080 [/187.12.59.74] failed: Connection timed out: connect

• 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 43s
Command: C:\Users\Hamrani\Desktop\flutterTest\aliflutter\android\gradlew.bat app:properties

Please review your Gradle project setup in the android/ folder.

و دستور فلاتر دکتر رو میزنم:

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, v1.7.8+hotfix.3, on Microsoft Windows [Version 10.0.17134.165], locale en-US)
[!] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
X Android license status unknown.
Try re-installing or updating your Android SDK Manager.
See https://developer.android.com/studio/#downloads or visit https://flutter.dev/setup/#android-setup for detailed instructions.
[√] Android Studio (version 3.4)
[√] VS Code, 64-bit edition (version 1.27.2)
[√] Connected device (1 available)

! Doctor found issues in 1 category.