check if it works
1. Backlight off now it doesn't work ( worked before V 2.2.50 ) Config Day/Night Switch select daytime
2. Add online Device - config device Management ( I add KH 6320,, and spinning icon only)
check if it works
1. Ringht ( only Restore All KD 8003 and KH 6320 / full configuration only KH 6320 device pairing KD 8003 / rest IVMS configuration, it helped for me
2. Backlight off ( worked before V 2.2.50 ) Config Day/Night Switch select daytime
3. Add online Device - config device...