I am getting the notification: Disable harmful app. On disabling it, I am still getting back the notification. What do I do? From the past few weeks, I am getting the notification:

Disable harmful app
&quot;System Notification Service&quot; can damage your device.

On tapping on the notification, I am getting two options:

Keep Anyway (Unsafe)
Ok

After pressing Ok,  a few minutes later, I am getting back the notification again.
In google play store app, in the play protect section, it has this detail:

This app can download potentially harmful apps.

My mom too has phone from the same brand; it too has started getting same notification.
Is there a problem? What do I do?
Edit: Model Number: Gionee P5L;
Android Version: 5.1;
Android security patch level: 2017-03-05;
Kernel Version: 3.10.65+;
Build Number: [SW VERSION]
P5L_0301_V5557
[HW VERSION]
P5L_Mainboard_P3;
System Version: amigo3.1
You can disable the security popup by Settings -> Google -> Security -> (Play Protect) And uncheck “Scan Device for Security threats”

If there are more details under that tab, then comment below.

For safer app installation, you can disable Unknown Sources in Settings -> Security -> Disable "Allow installation of apps from unknown source"

For safer browsing, you can install firefox for Android, and add ublock origin as an adblocker extension when browsing the web.