Sony STR-DN860 - Cannot Control the Receiver Using a Tv Sideview Device; Cannot Select the Network Settings Menu

It may take some time for the receiver to connect to the network after it is turned on. Try
again later.
The smartphone or tablet device may not be connected to the same network as the
receiver. Connect to the same network and try again.
Also see “Controller devices or applications on the home network cannot connect to the
receiver.”
Also refer to the “SongPal” help.
[261] Troubleshooting Network connection
Cannot control the receiver using a TV SideView device.
It may take some time for the receiver to connect to the network after it is turned on. Try
again later.
The smartphone or tablet device may not be connected to the same network as the
receiver. Connect to the same network and try again.
The receiver may have been removed from the TV SideView device list. Remove the TV
SideView device from the receiver as well, and then register again.
The TV SideView device may have been removed from the receiver device list. Remove
the receiver from the TV SideView device list as well, and then register again.
Also see “Controller devices or applications on the home network cannot connect to the
receiver.”
Also refer to the TV SideView help.
[262] Troubleshooting Network connection
Cannot select the Network Settings menu.
Wait for a few moments after you have turned on the receiver, and then select the
Network Settings menu again.
[263] Troubleshooting Home Network
Cannot connect to the network.