ExecuteQuery() fails with -2146232000 on Windows 8.1 (works great on Server 2013)

Question

When executing a small console app on my Windows 8.1, I get an error:
{"Name cannot begin with the ' ' character, hexadecimal value 0x20. Line 95, position 36."}
The code:
ClientContext ctx = Create();
Web web = ctx.Web;
List instNoteList = ctx.Web.Lists.GetByTitle(InstNoteListTitle);
List instDokList = ctx.Web.Lists.GetByTitle(InstDokListTitle);
ctx.Load(ctx.Web);
ctx.Load(instNoteList);
ctx.Load(instDokList);
ctx.ExecuteQuery();
This code works on a Server 2012 Image running HyperV: I can create lists, insert items, upload documents etc.
But on my host OS, this code fails.
Jorgen

Answer 1

I had the exact same issue and the exception was thrown at Line 95, position 36 when trying to access
our Sharepoint Online site. Is this related to authentication? I tried with multiple valid accounts and none of them worked so the chances of incorrect credentials should be low.
Here is the stacktrace
   at System.Xml.XmlTextReaderImpl.Throw(Exception e)
   at System.Xml.XmlTextReaderImpl.Throw(String res, String[] args)
   at System.Xml.XmlTextReaderImpl.ParseQName(Boolean isQName, Int32 startOffset, Int32& colonPos)
   at System.Xml.XmlTextReaderImpl.ParseElement()
   at System.Xml.XmlTextReaderImpl.ParseElementContent()
   at System.Xml.XmlTextReaderImpl.Read()
   at System.Xml.Linq.XContainer.ReadContentFrom(XmlReader r)
   at System.Xml.Linq.XContainer.ReadContentFrom(XmlReader r, LoadOptions o)
   at System.Xml.Linq.XDocument.Load(XmlReader reader, LoadOptions options)
   at System.Xml.Linq.XDocument.Load(XmlReader reader)
   at Microsoft.SharePoint.Client.Idcrl.IdcrlAuth.DoGet(String url)
   at Microsoft.SharePoint.Client.Idcrl.IdcrlAuth.RequestFederationProviderInfo(String domainname)
   at Microsoft.SharePoint.Client.Idcrl.IdcrlAuth.GetFederationProviderInfo(String domainname)
   at Microsoft.SharePoint.Client.Idcrl.IdcrlAuth.InitFederationProviderInfoForUser(String username)
   at Microsoft.SharePoint.Client.Idcrl.IdcrlAuth.GetServiceToken(String username, String password, String serviceTarget, String servicePolicy)
   at Microsoft.SharePoint.Client.Idcrl.SharePointOnlineAuthenticationProvider.GetAuthenticationCookie(Uri url, String username, SecureString password)
   at Microsoft.SharePoint.Client.SharePointOnlineCredentials.GetAuthenticationCookie(Uri url, Boolean refresh)
   at Microsoft.SharePoint.Client.ClientRuntimeContext.SetupRequestCredential(ClientRuntimeContext context, HttpWebRequest request)
   at Microsoft.SharePoint.Client.SPWebRequestExecutor.GetRequestStream()
   at Microsoft.SharePoint.Client.ClientContext.GetFormDigestInfoPrivate()
   at Microsoft.SharePoint.Client.ClientContext.EnsureFormDigest()
   at Microsoft.SharePoint.Client.ClientContext.ExecuteQuery()
Any suggestions?