It actually took me a few goes, I had to follow the latest notification, as described below.
I was also getting redirected to my profile page.
You may need to refresh your browser, and you will get a renewed QR Code, Follow the steps below.
When you open the browser window, you may also get a notification on your phone
Follow that link, and you should get your VK App landing page
Unlock with your spark
Open the QR camera on the top right
Scan the QR code
It will either
Open the VK Forum
Or
Ask you to scan your Spark again.
Like I say it also took me a few attempts also
Just make sure you have a “fresh” QR code…otherwise try renewing it