@AnnieGW 

Hi,
You can refer to the instructions below to troubleshoot if you fail to connect to the router's Wi-Fi.
What should I do if I fail to configure Tapo Camera?
 

If the problem remains, please confirm:
1. The troubleshooting you have tried and the results.
2. The LED status on the camera.
3. Have you enabled the settings, such as MAC Filter, firewall rules, etc., on your router? If so, disable them for a try.
4. Ensure the Tapo app is the latest one, and change the wireless password for a try if it includes special characters.
5. Enable a hotspot Wi-Fi on a phone, factory reset the camera, reconfigure it with another phone to connect it to the hotspot Wi-Fi, and check if it works.

Best Regards