Cannot grant permissions: black screen "Access to the app is blocked"

Question

The app which I install by Headwind MDM wants additional permissions. When I try to follow the wizard and open the settings, I get this message:

How can I avoid this black screen?

Answer 1

1. Open the configuration details, "MDM settings", and make sure the "Lock safe settings (WiFi, GPS, etc)" flag is not set. 

2. Open the device list, find the device where you got the issue, select ... -> Logs, and search for the message:

Blocked package by usage stats: com.android.settings / *************

Instead of *************, you will see the activity class name which needs to be enabled.

3. Open the configuration details, "MDM settings" tab, and paste this activity class name in the "Allowed activities" field. Save the configuration to apply changes.

4. If the problem persists, repeat steps 2-3. 

See also: 

How to enable certiain activities of disabled apps: https://qa.h-mdm.com/7634/

How to enable the application package ID: https://qa.h-mdm.com/1175/