What are the common causes of a Canon lens error and how can it be resolved?

Common causes of a Canon lens error include dirt or debris getting stuck in the lens mechanism, a misalignment of the lens components, or physical damage to the lens. To resolve the issue, you can try gently tapping the camera, blowing compressed air around the lens, or resetting the camera. If these methods do not work, it is recommended to seek professional repair services from Canon or a certified technician.