I had the same problem … failing to connect to the home wifi.
My SSID was 22 letters long … this was the first problem.
I noticed that after a connect failure it would not display the entire SSID name
I changed that to an SSID that was 10 letters long
After a number of tries it still would not connect
In desperation I added a space after my SSID eg would not connect to “happy wifi” but would connect to “happy wifi ”
I am not sure if that made a difference and it just requires a number of times to connect but adding a space made it work for me.
Also do not bother looking for a wifi antenna.. like in the pictures and the instructions.

Good Luck Dave 82000137