I’m sorry to hear you’re having trouble with this. No worries, we'll check this out. Could you tell us the message you're getting? How far are your Nest Protect devices from your Wi-Fi router? Can the device find or detect other networks? Are there devices or appliances (such as baby monitors, microwaves, cordless phones, etc.) near the camera? Also, what troubleshooting steps have you done so far?
Looking forward to your response.