http error 500.79 Internal server error

Question

I create web app and create app registration from active directory. and connected to web application. I used express security. But when I go to my web page I come across with this error.

Most likely causes:
IIS received the request; however, an internal error occurred during the processing of the request. The root cause of this error depends on which module handles the request and what was happening in the worker process when this error occurred.
IIS was not able to access the web.config file for the Web site or application. This can occur if the NTFS permissions are set incorrectly.
IIS was not able to process configuration for the Web site or application.
The authenticated user does not have permission to use this DLL.
The request is mapped to a managed handler but the .NET Extensibility Feature is not installed.

I cant find any solution anywhere. I am full support azure user. and also I didn't see any help. Please help.

Answer 1

@Oguzhan KAYA
I've removed the "azure-active-directory" tag and have reached out to our Web apps team so they can take a look into this issue.

Stack Overflow issues where customer's received the same error and had to recreate their apps:
500.79 Internal Server Error - The page cannot be displayed because an internal server error has occurred
HTTP 500.79 Error / System.UriFormatException when deploying ASP.NET App to Azure Web App

Additional Link:
HTTP Error 500.19 when you open an IIS Webpage

Thank you for your time and patience throughout this issue!