1. Install Nova Launcher (you don't have to use it, just install it)
2. Tap And hold on home screen and go to widgets
3. Chose Nova Launcher - Activities and place it on home screen
4. Scroll Down until you find settings and open it
5. Now scroll all the way down until you see Status bar style (.settings$NotchSettingsActivity
6. Select it
In the case it will be not working I would like to ask you to enter Safe mode in your device and perform these steps one more time.
Please enter Safe Mode on your phone by holding the Power button, until you see a message to restart or power off the device. After that hold the Power off Message, until you get a question to reboot your phone in Safe Mode - press OK.
In order to turn Safe Mode Off, you just need to restart your device.
Here is a video about how to enter Safe Mode: https://www.youtube.com/watch?v=L89mxJRSYco