This suggests you haven't enabled location services for HiddenApp on your device.

For macOS please navigate to:

1. System Preferences
2. Security and Privacy
3. Privacy
4. Full Disk Access
5. Click to enable Full Disk Access

For Windows 10 please navigate to:

1. Start
2. Settings
3. Privacy
4. Location
5. Enable Location

For iOS please navigate to:

1. Settings
2. HiddenApp
3. Enable Location
4. Set to Always