Your device isn't compatible with this version

Google play doesn’t show the app. I go to Blizzard website, it opens Google play and I see it there. But it says: “your device isn’t compatible with this version”.
There were many reports through years but I didn’t see a solution. Is it fixable or if it shows that error then that’s it?

You don’t appear to have mentioned what your device is, i.e. make / model of phone or tablet, etc.