After I login I see a blank screen on my Android device

Some mobile phone companies like for instance Xaomi have developed their own UI and standard applications called MIUI.

One of those applications is the browser, unfortunately that browser does not support the protocol which the VeloDS requires to complete the login procedure.

It’s is better the download the Google Chrome application and make that your default browser.

HOWTO

Nederlands: https://mifans.nl/standaard-apps-browser-en-launcher-aanpassen-in-miui/ of https://support.google.com/chrome/answer/95417?hl=nl&co=GENIE.Platform%3DAndroid

English: https://support.google.com/chrome/answer/95417?co=GENIE.Platform%3DAndroid