After performing a factory reset on the device, you do not see the initial "Welcome/Hello" screen, or attempting to tap or hold does not activate the camera for QR code scanning.
Your device does not support MDM (Managed Device Mode).
You could try using the alternative installation method via APK. See the "Alternative installation via APK" chapter in this manual for details.
During the installation process, I get a message stating that the app can’t be downloaded.
In order to successfully download the application, you need to ensure that your connected WiFi network provides internet access, and that there are no network security measures, e.g. a firewall or DNS filtering, preventing the app from being downloaded.
Check that https://ve3.nl/gxDisplay is reachable from your device. Otherwise, try connecting from a different network.
During the installation process, I get a message stating that the admin app can’t be installed.
If the device is owned by an organization (a company owned device), you may need to perform a factory reset through the Android bootloader menu. For guidance on accessing the bootloader for your particular device model, please refer to its user manual. Alternatively, consider contacting the relevant IT department for the owning company and asking them to remove the device from their management.
The device might be subject to parental controls through Google Family Link. Remove supervision from the parental control service.
The app may not be compatible with the device, resulting in an unsuccessful installation.