Can't click install button on TV box which runs adroid system

[Android Central Question]

I have a Mibox 3 tv box, which allows expand the memory with flash drive, so I download couple apk to the flash drive, and plus in to the tv box, but when I tried to install the apk, the install button doesn't work.

 

[B. Diddy]

Welcome to Android Central! It might be a Screen Overlay issue. See this article: https://www.howtogeek.com/271519/how-to-fix-the-screen-overlay-detected-error-on-android/