So I have the Xiaomi Mi Box, and it's updated to Oreo... But when trying to use the FDroid app... I can't install anything. Other apps I have been able to enable the unknown sources privledge but FDroid won't show up there... What could possibly be wrong? And while I'm at it, what app should I use to move about my screen with a mouse cursor? Because I tried my bluetooth mouse and it didn't work, so I'm wondering if there a, free please, app to switch modes to mouse mode for the remote?

EDIT: Solved, just needed the reboot