KV.com does not work. The detailed instructions are asking you to do something the site does not allow and can cause your account to be removed.

Please review image link. https://screencast.com/t/c4FCnsWH

Explicit instructions are echoed in the browser NOT to to do this: “Please copy that URL completely and past it to the “vKontakte(VK) Auth Response” field.”

“Please do not copy the data from the address bar to third-party sites. So you can lose access to your account.”

Also, the text field for the above does not retain the data. It disappears. Which prevents the test post button from appearing to do a test post. And there is also a missing prompt to complete the setup for the app to be verified as well.