مشکل در flutter run

سلام و عرض ادب
اقا من تازه فلاتر روشروع کردم و موقع اجرای دستور flutter run توی cmd ارور بهم میده
از ابزار های shecan و begzar هم استفاده کردم (*** مطمئن پیدا نکردم ) هرکاری هم میکنم اوکی نمیشه مشکل چیه ؟
@hesammousavi

C:\Users\Farshad\Desktop\myapp>flutter run
Launching lib\main.dart on Nokia 6 1 in debug mode...
Exception in thread "main" java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 403 Request blocked by Privoxy"
        at sun.net.www.protocol.http.HttpURLConnection.doTunneling(HttpURLConnection.java:2152)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:183)
        at sun.net.www.protocol.http.HttpURLConnection.followRedirect0(HttpURLConnection.java:2739)
        at sun.net.www.protocol.http.HttpURLConnection.followRedirect(HttpURLConnection.java:2651)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1830)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
        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)
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done                         3.5s
[!] Gradle threw an error while downloading artifacts from the network. Retrying to download...
Exception in thread "main" java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 403 Request blocked by Privoxy"
        at sun.net.www.protocol.http.HttpURLConnection.doTunneling(HttpURLConnection.java:2152)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:183)
        at sun.net.www.protocol.http.HttpURLConnection.followRedirect0(HttpURLConnection.java:2739)
        at sun.net.www.protocol.http.HttpURLConnection.followRedirect(HttpURLConnection.java:2651)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1830)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
        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)
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done                         4.4s
[!] Gradle threw an error while downloading artifacts from the network. Retrying to download...
Exception: Gradle task assembleDebug failed with exit code 1