GitHubのクライアントを使用しているときにエラーが発生する：System.Net.WebException：リモートサーバーがエラーを返しました：（407）プロキシ認証が必要です

Question

2017-07-02 17:37:51.8708|INFO|thread: 5|AsyncReaderWriterLock|Released concurrent scheduler for operation: 10 at GitClient.cs:290 after blocking 0.4168211s 
2017-07-02 17:37:52.2268|INFO|thread: 1|ObservableEx|Could not refresh repository information from API failed. 
System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: The remote server returned an error: (407) Proxy Authentication Required. 
    at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult) 
    at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar) 
    --- End of inner exception stack trace --- 
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Octokit.Internal.HttpClientAdapter.<Send>d__2.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Octokit.Connection.<RunRequest>d__27.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Octokit.Connection.<Run>d__23`1.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Octokit.ApiConnection.<Get>d__0`1.MoveNext() 
2017-07-02 17:37:52.2318|INFO|thread: 1|AsyncReaderWriterLock|Acquiring concurrent scheduler for operation 12 at BranchesViewModel.cs:356 
2017-07-02 17:37:52.2318|INFO|thread: 4|AsyncReaderWriterLock|Acquired concurrent scheduler for operation: 12 at BranchesViewModel.cs:356 after waiting 6.27E-05s 
2017-07-02 17:37:52.2318|INFO|thread: 1|AsyncReaderWriterLock|Acquiring concurrent scheduler for operation 13 at RepositoryViewModel.cs:318 
2017-07-02 17:37:52.2318|INFO|thread:14|AsyncReaderWriterLock|Acquired concurrent scheduler for operation: 13 at RepositoryViewModel.cs:318 after waiting 6.9E-05s 
2017-07-02 17:37:52.2548|INFO|thread: 5|AsyncReaderWriterLock|Released concurrent scheduler for operation: 12 at BranchesViewModel.cs:356 after blocking 0.0226196s 
2017-07-02 17:37:52.2758|INFO|thread: 1|NewPullRequestViewModel|No matching pull request found, clearing selection... 

Answer 1

このエラーが発生する前に、 設定ファイルに何か問題があると思います。 ユーザ名、パスワード、ポートなどを確認してください（git config --listを使用）