The results are helpful.

The reason for checking the Network Diagnostic menu is sometime the antenna in Radio gets broken. The 100% and some of the other details seem to indicate that wifi is OK.
The appearance of the address as (amazon address) and ( seems to indicate that DNS is working.
Do you use DHCP ?

The answers to the test indicate that your radio is connected to and not a local LMS sever.

I don't know your setup -
Do you have a local LMS server on your home network (server version is shown in WebUI Setting/Info tab)
If you have a local LMS server - go to Radio top level menu (home button) and select My Music, connect to local LMS and then run Server Info menu again.