我已经安装了node.js，当尝试安装npm时出现此错误。

  

 public static IWebHost CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .ConfigureAppConfiguration((ctx,builder) =>
                    {
                       // var keyVaultEndpoint = GetKeyVaultEndpoint();
                       // if (!string.IsnullOrEmpty(keyVaultEndpoint))
                       // {
                       //     var azureServiceTokenProvider = new AzureServiceTokenProvider();
                       //     var keyVaultClient = new KeyVaultClient(new  VaultClient.AuthenticationCallback(azureServiceTokenProvider.KeyVaultTokenCallback));
                       //    builder.AddAzureKeyVault(keyVaultEndpoint,keyVaultClient,new DefaultKeyVaultSecretManager());
                       //  }
                    }
                ).UseStartup<Startup>()
                .Build();

        private static string GetKeyVaultEndpoint() => "https://XXX.vault.azure.net/";