No power in LCD and Led indicator but viewfinder has power but "ERR"

I was using my camera and suddenly it turns off. I thought the battery was dead since it wouldn't turn on (No LCD and no blinking in activity indicator LED light) but when I changed the battery it was still "off".

I pressed the shutter button and the shutter "clicks" so I look through the viewfinder and saw that it was just displaying ERR. It would still shot and release the shutter but not saving to SD card. After every other shutter release it would display ERR and when I click again it would display Aperture and Shutter speed but not battery level and shots left.