This is information for setting up a camera's WiFi information or modifying it when switching to a new router/homeplug/WiFi booster.
First you need to make sure the camera is online and working properly.
Open each camera's 'Wi-Fi Connection Configuration' page, press the 'Change' button to select the desired WiFi access point and enter this point's WiFi password. Press the 'eye' icon to confirm you have entered the right password.
Press 'Save' and wait around 1-2 minutes for the Base Station to find the camera using the new WiFi information.
If this doesn't work, you may need to look at this link to setup WiFi through PC.