I'm really new to all this. I've looked through everything in the FAQs, related documentation and is searched this forum but I couldn't find anything that matched this problem.
I haven't been able to get a game called My Hero Ultra Impact from the play store to work. At first it was because the 'security if device was too low.' I fixed this by turning off 2 credentials ('GlobalSign Root CA' and 'GTS Root R1'). I still can't play due to 'error code 3.' I contacted the game's support to find out what the error meant. According to them there are a few reasons why this could be happening.
Options are; rooting of a device (unless you can do this accidentally I haven't rooted my phone), an app that can execute actions such as rooting privileges is installed (99% sure I don't have such an app, unless Shelter counts), an emulator is being used (no emulators) or the app has been modified (downloaded it using the Google Play Store).
I did all the obvious stuff too; uninstall and re-install, restarting phone, giving all permissions, turning on 'exploit protection compatibility mode,' etc. I'm stumped, I need some help and I would really appreciate any possible. Sorry this is so long, I wanted to include all the relevant information.