Error on page preview mode in Kentico 13 after Okta integration

Question

I'm trying to run Kentico 13 CMS in preview mode but i'm getting the following error.

An unhandled exception has occurred while executing the request.
Message: Try reloading the administration interface. The user was not found in the JWT token, nor in the current virtual context URL.

Exception type: CMS.Helpers.InvalidVirtualContextException
Stack trace:
at Kentico.Content.Web.Mvc.VirtualContextPrincipalRetriever.GetPrincipal(String jwtToken)
at Kentico.Content.Web.Mvc.VirtualContextRequestPrincipalRetriever.Retrieve(HttpRequest request)
at Kentico.Web.Mvc.AuthenticationHandler.HandleAuthenticateAsync()
at Microsoft.AspNetCore.Authentication.AuthenticationHandler`1.AuthenticateAsync()
at Microsoft.AspNetCore.Authentication.AuthenticationService.AuthenticateAsync(HttpContext context, String scheme)
at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
at IMPlus.Web.UI.Middleware.CultureMiddleware.<>c__DisplayClass3_0.<g__invokeImplementation|0>d.MoveNext() in C:\Users\inraja03\source\repos\IM Plus\BackEnd\IMPlus.Web.UI\Middleware\CultureMiddleware.cs:line 45
--- End of stack trace from previous location ---
at IMPlus.Web.UI.Middleware.CultureMiddleware.InvokeAsync(HttpContext httpContext) in C:\Users\inraja03\source\repos\IM Plus\BackEnd\IMPlus.Web.UI\Middleware\CultureMiddleware.cs:line 28
at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
at Kentico.Content.Web.Mvc.ContentOutputMiddleware.InvokeAsync(HttpContext context)
at Kentico.Web.Mvc.KenticoRequestLocalizationMiddleware.InvokeAsync(HttpContext context)
at Kentico.Content.Web.Mvc.PageRedirectionContextMiddleware.InvokeAsync(HttpContext context)
at Kentico.Web.Mvc.KenticoRequestEventsMiddleware.InvokeAsync(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.StatusCodePagesMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)

Few things which i observed

1. We have integrated Okta SSO authentication on live site. It works
   fine when i disable Okta. I am able to view the page under preview
   mode after i have disabled Okta.

2. This issue occurs only in our UAT and Prod instance not in
   development instance. Our Admin site and Live Site are mapped under the same domain.