MVC Application not authenticating

I have created an MVC windows authenticated application.
SSL is Enabled on the application.
I have created the OKTA application and trusted connection.
I have successfully authenticated.

However:
When I implement OKTA on an existing MVC windows authenticated application I’m having issues.
SSL was not initially Enabled on the application, it has been enabled.
I have created the OKTA application and trusted connection.
Return uri’s are correct. I have confirmed these multiple times.

errors received:
error on run: An existing connection was forcibly closed by the remote host|
error on refresh: IDX20803: Unable to obtain configuration from: ‘System.String’.

Are you using a developer org for this application? Are you seeing any network calls being made by your application when this failure occurs?

You might be having an issue with the authorization server being used, take a look at a related post to se how one user resolved: Dotnet core OKTA not accepting Authorization header token from React - #5 by clawlor

yes “ksc”
no
i will review