Why can't I remove this screen overlay error from my note 4

[Android Central Question]

I have tried all the steps to remove the overlay problem on my phone it's not working what can I do

 

[B. Diddy]

Welcome to Android Central! What are all the steps you've tried? It'd help to know, so that people don't suggest things you've already tried.

Have you already seen this? https://www.howtogeek.com/271519/how-to-fix-the-screen-overlay-detected-error-on-android/