I registered Yellow card early this year, but the KYC took forever to be verified. Abandoned as we speak.
In the email, they say the web app will not longer be available, that can be a little confusing as it's not the same thing as the web browser version. Some apps have pc version and the browser version which is different.
They were basically operating a mobile app and a web app in the same way that WhatsApp does - you can still access the service through the app or a web browser, but not through their wep app anymore. I'm not sure if my explanation is clear.