Melisa, that error is really only a very generic error "Err 80 Malfunctions related to the electric control or images have been detected."
-Turn the power switch to OFf then to ON; to turn on the power again.
-Remove and re-install the battery. (I believe it also has a RTC battery that needs to be checked)
-Use a Canon lens.
Clean the area where the lens meets the body with a pencil eraser. Hope this helps, good luck.