Unable to connect the gateway to WiFi after fw rewrite

Hi guys, 
I've followed the procedure to rewrite the firmware using rtkboot_115200.bin and mgl03_1.4.7_0160_mod20210309.uart files.
The procedure went fine but unfortunately I'm unable to connect the gateway to my WiFi - the Mi Home phone app sees the gateway but it doesn't connect to the access point. 
Any idea how to solve this issue?
Thanks