Unauthorized removal of usage restrictions
For security reasons, the Access App does not work on devices on which the manufacturer’s user restrictions have been removed (rooting, custom ROMs, etc.). Please reset the device to its original state to use the Access app.
Apps like SuperSU or Magisk can also block the Access App, as they could affect security from the point of view of the Access app. Uninstalling these apps will help.
For security reasons, certain accessibility apps cannot be used together with the Access App. Please remove or uninstall these apps.
If you’re having problems downloading or installing the Access App, try emptying the Google Play Store cache. Here is an example of how to do that on a Samsung phone:
Open the device’s settings
Select Google Play
Tap Delete cache and Delete data
Your issue should be solved now.