The camera is not communicating with the modem.
If you put a security code in your camera you will need to remove the security code if you are using the modem.
Make sure the camera has the correct firmware. https://www.moultriefeeders.com/support-firmware-faq
Make sure you have a compatible SD card.
Always format your SD cards prior to use by erasing/deleting all images inside the camera.
Make sure the plug is in tight. Sometimes the rubber grommet can prevent it from plugging in all the way. We recommend pulling the rubber grommet back out of the way. Check the port to make sure the direction of the plug. Plug the chord straight in and then push the rubber grommet into the hole.
Good USB Port
Damaged USB Port
Note: A Damaged USB port is considered physical damage and is not covered under warranty.