Http 500 Error on Middleware

[bkotar1]

We hosted .net 4.6.1 core app on IIS with asp.net identity but we are getting this error on the log file. We could not figure out what is causing the issue. How do i know, please advise. Please see the below log file.

017-10-30 21:31:44.8963|11|Microsoft.AspNetCore.Authentication.Cookies.CookieAuthenticationMiddleware|INFO|AuthenticationScheme: Identity.External signed out.
2017-10-30 21:31:58.0740|1|Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.ViewResultExecutor|INFO|Executing ViewResult, running view at path /Views/Account/Login.cshtml.
2017-10-30 21:31:59.9061|2|Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker|INFO|Executed action OrderStatus.Controllers.AccountController.Login (OrderStatus) in 15592.1713ms
2017-10-30 21:31:59.9061|0|Boilerplate.AspNetCore.Middleware.InternalServerErrorOnExceptionMiddleware|INFO|Executing InternalServerErrorOnExceptionMiddleware, setting HTTP status code 500.
2017-10-30 21:31:59.9371|2|Microsoft.AspNetCore.Hosting.Internal.WebHost|INFO|Request finished in 15662.2665ms 500 text/html; charset=utf-8

[RehanSaeed]

Not enough info provided. Feel free to reopen with more info.