@Narendrakumar 

Hi,
You can refer to the instructions below to troubleshoot when failing to configure the camera.
What should I do if I fail to configure Tapo Camera?
 

Please confirm the following information for the reported case for further analysis.
1. The LED status on the camera when configuring it.

2. The error message appears on the Tapo app when configuring it. 
If the camera detects the home Wi-Fi but can't connect when configuring it, please ensure you have entered the correct password and no special settings, such as MAC Filtering, firewall rules, etc., on the router that block the camera from connecting.

3. You can enable a hotspot Wi-Fi on your phone, reset the camera, reconfigure it with a different phone, connect it to the hotspot Wi-Fi, and check if it will be configured successfully.

Best Regards