Try to pair the indoor camera with the HomeBase 3 according to this article:

How to Pair the IndoorCam With HomeBase 3? 

If the connection still cannot be finished successfully, please check the following information:

1. Make sure your camera and HomeBase 3 are powered on. 
2. Make sure they are both connected to the same network. 
3. Make sure your network router is functioning normally (it may help to restart your network router).

If the issue still cannot be solved, please contact us for assistance.