Pico with WiFi shim problems

I just tried it here and it works fine for me on a 2v01 Pico:

Connecting to WiFi
Connected
Fetching data
Hello
>wifi.getIP(print)
=undefined
null 192.168.1.74
>wifi.getVersion(print)
=undefined
null AT version:0.25.0.0(Jun 12 2015 20:26:28)
> 

So it may well be something to do with your WiFi setup. What does wifi.getIP(print) return for you?