I'm using iPlayer on a 3rd gen Mi Box. I'm outside of UK. I use VPN. I installed the iPlayer app apk through a link that I found here on Reddit. It's an old version of the iPlayer. It currently works perfectly but suddenly started to display the screen on the image I uploaded. The link on the screen leads to a page that make it seem like my device will not be supported anymore but what exactly BBC is doing here? Is it a legal issue or Android version issue or iPlayer version issue? Any advice appreciated.

EDIT: Mi Box is on Andriod v14, iPlayer version is old because it's the only apk I could sideload. Currently works perfectly but not for long apparently. Couldn't install through play store no matter what tricks I tried. APKmirror, APKpure don't help either.