Exactly the same problem here, I shall repost my more detailed information about this issue:
Original message details are unavailable.
I got Android 7.1.1 (Samsung Galaxy J5 2016) and been using OSRS (Beta) since 5.7.2018 already. Now after update, it started downloading the client n stopped with the error message: "Old School Runescape has encountered a problem. Your client needs updating. Opening store page..."
It didn't open the page and now when trying to search for "Old School Runescape" in Play Store, it's nowhere to be found. Tried deleting the beta version and search again, no such a luck.
Only way I found it, was through the browser and there it kept telling me that my device is not compatible with this version and wont let me download it, even though I have the latest Android updates (7.1.1, and it SHOULD BE working on 5.0 or newer) and was working perfectly for 4,5months before the recent update, on last thursday 22.11.
Neriphyra replied to my topic last weekend, saying that this issue will be shared to the team to look into, but no other reactions / Jmod replies on this big issue yet, that is blocking probably thousands of eligible users from downloading / using mobile.
Please, could this issue be handled Asap?
29-Nov-2018 16:26:19