Why does my Canon camera display a lens error and shutdown automatically?

Your Canon camera may display a lens error and shutdown automatically due to a mechanical issue with the lens, such as being stuck or misaligned. This can happen if the camera is dropped or bumped, or if there is debris obstructing the lens movement. It is recommended to try gently tapping or rotating the lens to see if it can realign, or to seek professional repair if the issue persists.