ASP MVC Authorization via Vkontakte - Does not redirect to the authorization page. How to fix it?

Question

ASP.NET

Good afternoon!
I'm testing authorization in VK. Created an empty asp mvc application with authorization. Added package https://github.com/DukeNuken/Duke.Owin.VkontakteMi... for authorization in VK. I set up everything as described there.
Set up and created an application in VK.

At first, when I clicked through authorization in VK, I was redirected to the authorization page. I logged in there BUT when returning, the ASP MVC application did not transfer me to the authorization status.
Now, when I click on authorization through VK, it takes me back to the page from which I chose the authorization method.
Tried clearing cookies and cache - didn't help.
When authorizing through Google - authorization passed. But in the future, if I log out from my site and log in again, I will log in without entering a password. It feels like there's a "remember me" checkbox somewhere, but I don't know where. And the session does not seem to be broken.
How to understand why this happens and how to fix it?
For example, here is my test project https://github.com/vailukhin/TestVKAuth

Answer 1

Most likely, the problem is that the library does not specify the API version parameter - V in the authorization requests. Recently, requests without this parameter return an error: https://vk.com/dev/version_update