Tfs Microsoft Api is failing to get httpclient to create workitem - tfs

Question

Could someone please help what does this error means
is it some connection issue?
operation performed on onpremise tfs server
here i am using TFS personal access token to do authorize operations.

Answer 1

Here is a code snippet creating a Bug work item in DevOps using HttpClient library, for your reference:
public class CreateBug
{
readonly string _uri;
readonly string _personalAccessToken;
readonly string _project;
public CreateBug()
{
_uri = "https://xxx.visualstudio.com";
_personalAccessToken = "xxx";
_project = "xxxxx";
}
public WorkItem CreateBugUsingClientLib()
{
Uri uri = new Uri(_uri);
string personalAccessToken = _personalAccessToken;
string project = _project;
VssBasicCredential credentials = new VssBasicCredential("", _personalAccessToken);
JsonPatchDocument patchDocument = new JsonPatchDocument();
//add fields and thier values to your patch document
patchDocument.Add(
new JsonPatchOperation()
{
Operation = Operation.Add,
Path = "/fields/System.Title",
Value = "Authorization Errors"
}
);
patchDocument.Add(
new JsonPatchOperation()
{
Operation = Operation.Add,
Path = "/fields/Microsoft.VSTS.Common.Priority",
Value = "1"
}
);
VssConnection connection = new VssConnection(uri, credentials);
WorkItemTrackingHttpClient workItemTrackingHttpClient = connection.GetClient<WorkItemTrackingHttpClient>();
try
{
WorkItem result = workItemTrackingHttpClient.CreateWorkItemAsync(patchDocument, project, "Bug").Result;
Console.WriteLine("Bug Successfully Created: Bug #{0}", result.Id);
return result;
}
catch (AggregateException ex)
{
Console.WriteLine("Error creating bug: {0}", ex.InnerException.Message);
return null;
}
}
}

Answer 2

Due to error message text was having encoding issue, was not able to figure out the issue, Did debug on server and found out TTFS url with collection was not forming properly hence it was giving "page not found" error message, after that we fixed it by updating the tfs api url.