C# service cannot connect to web service after server upgrade

I am using HttpClient.PostAsync to call a REST web service (Unified Endpoint Management, but I doubt that is relevant) on a remote (internal LAN) server. The call is throwing an exception as follows: 10/15/2020 5:05:25 AM An error occurred while sending the request. 10/15/2020 5:05:25 AM at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() 10/15/2020 5:05:25 … Read more

can i duplicate a Tab item based on a number in asp.net core

Im new to asp.net core and im working on a project where I have to create a page where I have to create to duplicate Tab page based on a number.
user enters number in the textbox and based on the number tab items have to be created which carries the same form elements.
I tried with creating tab page but unable to continue the next step,
please help me with this.
thanks in advance