Make sure the encryption key displayed by the camera is correctly entered into the Android™ device (when using the camera as an access point).
Please make sure that your camera and Android™ device are connected to an access point (When using another access point for connecting).
Please start Canon CameraWindow (for Android™).
Please make sure that Canon CameraWindow (for Android™) is not running in the background.
After forcing Canon CameraWindow to close on the Android™ device’s application settings, try to connect a second time by following the connection procedures.
Please uninstall Canon CameraWindow (for Android™) and then install it a second time.