如何使用Android Studio解决抖动中的gradle错误？

Question

我安装了具有flutter的所有要求的android studio，当我运行flutter doctor时，一切都很好，并且安装正确。我创建了一个普通的android项目，它运行正常，没有错误。现在，在创建新的flutter项目之后，每当我运行该项目时，都会出现此错误。我无法解决。

在调试模式下为x86构建的Android SDK上启动lib main.dart ...正在初始化gradle ...错误完成：ProcessException：进程“ C： Users Nesma AndroidStudioProjects flutter_app flutter_apptest android gradlew.bat”异常退出：正在下载https://services.gradle.org/distributions/gradle-4.10.2-all.zip

Exception in thread "main" java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 503 Too many open connections"
    at sun.net.www.protocol.http.HttpURLConnection.doTunneling(HttpURLConnection.java:2142)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:183)
    at sun.net.www.protocol.http.HttpURLConnection.followRedirect0(HttpURLConnection.java:2729)
    at sun.net.www.protocol.http.HttpURLConnection.followRedirect(HttpURLConnection.java:2641)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1824)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:263)
    at org.gradle.wrapper.Download.downloadInternal(Download.java:58)
    at org.gradle.wrapper.Download.download(Download.java:44)
    at org.gradle.wrapper.Install$1.call(Install.java:61)
    at org.gradle.wrapper.Install$1.call(Install.java:48)
    at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
    at org.gradle.wrapper.Install.createDist(Install.java:48)
    at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128)
    at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
  Command: C:UsersNesmaAndroidStudioProjectsflutter_appflutter_apptestandroidgradlew.bat -v