When registering Samsung appliance, the AP display turns off and the screen freezes at 48%.

Check your router configuration.

Refer to the user manual provided with the router to check the router configuration and make the following changes.

      
- UPnP Setting (Port forwarding): ON/ENABLED   
- Multicast Forwarding (IGMP): ON/ENABLED

Note: The format, location, and configuration values of the settings menu of the router may differ by manufacturer.

Update the router firmware.

You can prevent certain problems that may occur with the connection by updating the firmware to the most recent version. Manufacturers continuously update router firmware to fix errors and malfunctions.

Note: The method of updating the firmware for different routers may
differ. Refer to the user manual provided with the router for more details.