Commented Unassigned: Error during installation - Exception reading manifest [25899]

Won't install
System Info: Windows 8.1, 64 bit, 8GB, i7-4600U, Office 2013 (click-to-run), O365

Error is as follows: There was an error during installation
Name: NodeXL Excel Template
From: http://www.nodexlgraphgallery.org/NodeXLSetup.ExcelTemplate.vsto
Error Details:
Name: NodeXL Excel Template
From: http://www.nodexlgraphgallery.org/NodeXLSetup/Smrf.NodeXL.ExcelTemplate.vsto

************** Exception Text **************
Microsoft.VisualStudio.Tools.Applications.Runtime.InvalidManifestException: Exception reading manifest from http://www.nodexlgraphgallery.org/NodeXLSetup/Smrf.NodeXL.ExcelTemplate.vsto: the manifest may not be valid or the file could not be opened. ---> System.Net.WebException: The remote server returned an error: (407) Proxy Authentication Required.
at System.Net.HttpWebRequest.GetResponse()
at System.Xml.XmlDownloadManager.GetNonFileStream(Uri uri, ICredentials credentials, IWebProxy proxy, RequestCachePolicy cachePolicy)
at System.Xml.XmlDownloadManager.GetStream(Uri uri, ICredentials credentials, IWebProxy proxy, RequestCachePolicy cachePolicy)
at System.Xml.XmlUrlResolver.GetEntity(Uri absoluteUri, String role, Type ofObjectToReturn)
at System.Xml.XmlTextReaderImpl.OpenUrlDelegate(Object xmlResolver)
at System.Threading.CompressedStack.runTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
at System.Threading.CompressedStack.Run(CompressedStack compressedStack, ContextCallback callback, Object state)
at System.Xml.XmlTextReaderImpl.OpenUrl()
at System.Xml.XmlTextReaderImpl.Read()
at System.Xml.XPath.XPathDocument.LoadFromReader(XmlReader reader, XmlSpace space)
at System.Xml.XPath.XPathDocument..ctor(String uri, XmlSpace space)
at System.Xml.XPath.XPathDocument..ctor(String uri)
at Microsoft.VisualStudio.Tools.Applications.ServerDocument.AddCustomization(String documentPath, Uri deploymentManifestUrl)
--- End of inner exception stack trace ---
at Microsoft.VisualStudio.Tools.Applications.ServerDocument.ThrowManifestException(String url, Exception inner)
at Microsoft.VisualStudio.Tools.Applications.ServerDocument.AddCustomization(String documentPath, Uri deploymentManifestUrl)
at Smrf.NodeXL.ExcelTemplatePostDeploymentAction.PostDeploymentAction.SetAssemblyLocationInTemplateFile(AddInPostDeploymentActionArgs args)
at Smrf.NodeXL.ExcelTemplatePostDeploymentAction.PostDeploymentAction.Execute(AddInPostDeploymentActionArgs args)
at Microsoft.VisualStudio.Tools.Applications.Deployment.PostDeploymentActionsHost.Execute(Int32& lastExecutedPostAction, Uri deployManifestUri, AddInInstallationStatus installStatus, String deployManifestXml, String appManifestXml, String hostManifestXml, String[] postActionDataXmls, String productName, String version, String applicationBase, String[] assemblyClassNames, String[] assemblyNames, String[] assemblyFullNames)
at Microsoft.VisualStudio.Tools.Applications.Deployment.PostDeploymentActionsHost.Execute(Int32& lastExecutedPostAction, Uri deployManifestUri, AddInInstallationStatus installStatus, String deployManifestXml, String appManifestXml, String hostManifestXml, String[] postActionDataXmls, String productName, String version, String applicationBase, String[] assemblyClassNames, String[] assemblyNames, String[] assemblyFullNames)
at Microsoft.VisualStudio.Tools.Applications.Deployment.ClickOnceAddInDeploymentManager.InvokePostActions(Uri deploymentUri, AddInInstallationStatus installStatus, String deployManifestXml, String appManifestXml, ApplicationManifest manifest, String productName, String version, AppDomainSetup appDomainSetup)
at Microsoft.VisualStudio.Tools.Applications.Deployment.ClickOnceAddInDeploymentManager.InstallAddIn()
Comments: ** Comment from web user: dianrips88 **

i also have same error,