Help with Install

Been trying to install a gen4 Android, WiFi to replace my 18-month old BRICK
I can’t get past the Check LED indicator

where I should next select my network. I have been on the phone with @Tablo 3-times. I have gotten all the usual Tablo BS, including having to delete my old Tablo account and establish a new one with a different email address. I have reinstalled the app, reset the Gen4, and restarted my router multiple times. BTW Ethernet is NOT an available option.

Any constructive help appreciated. BTW my 3-year old Legacy t4 keeps chugging along.