Okay Follow these steps 1.Go to settings 2.Search apps 3.search device policy 4.Click on device policy and uninstall it. 5.Then search device security 6.Click on it force stop it then clear all data 7.Then go to device management and click on reset and then click on reset all settings.
If you can't find device policy then in right side of all apps after click on apps you will find 3 vertical bars click on it and then click on show system apps.
