CA certificate notification

The obvious solution is to delete that ad block app you installed!
By installing it you gave them permissions to monitor everything you do with your phone!
When you install ANY app in your device you should always read the permissions you give that app.
One other thing you could try...,
Go to settings, then to all apps,
Find that app and adjust the permissions settings.
Or in other words, deny it permission to monitor your activity!
Hope this helps!

— modified on Dec 9, 2018, 2:19:07 PM

OK!
But you may look into other ad blocker apps that don't require those permissions! There are many of them available.
Take care!

I don't use add blockers so I am not familiar with the different names.
But I know there are a lot of them in Google play store you can choose from.
I do something different!
I went into Google setting and paused my web activity and my location history. And when I open up the internet I turn on my secret mode.
This block's your device ID number so advertisers don't know who to send the ads to!
And I have managed to stop a lot of pop up ads doing these steps.
And I didn't have to install any extra apps!

It should block the ads generated by your web activity!
As far as the ads that the developers put in thier apps! Probably not!
They get paid for those ads!
That's how they make thier money off the app.