Diagnosis
The setup process is failing at the stage where the camera attempts to join your Local Area Network (LAN). This is usually a router compatibility or signal strength issue.
How to Fix It
Follow this checklist. Ensure your phone is connected to your home's 2.4 GHz Wi-Fi band, not 5 GHz. Disable any VPN on your phone. Place the camera and sync module within 3 feet of each other during setup. Restart your smartphone. Finally, restart your router. Now attempt setup again from the beginning.
If That Didn't Work
Your router may have a restrictive security protocol. Temporarily change your Wi-Fi security setting to WPA2-PSK (AES). Do not use WPA3-only or WPA/WPA2 mixed mode for the initial setup. You can change it back after the camera is added.
Heads Up
The QR code is only valid for the initial setup of that specific camera. If you scanned it and setup failed, you must delete the incomplete camera entry from your Blink app's Manage System > Manage Devices screen before you can try scanning the code again.