Most likely you have accidentally moved the camera while pressing the shutter button to take a photo.
Remember to use the focus feature on the AZ401 by pressing the shutter button half-way down to focus on your subject, the camera will present a 'green' box around your subject(s) and that is your key to fully depress the shutter to take your photo/picture.
Try using the AZ401's built-in OIS (Optical Image Stabilization) feature. Doing so will help the camera compensate with accidental camera movement or shaky environments where you cannot keep the camera steady.
Another option is to use a tripod or monopod using the 1/4" standard screw mount at the bottom of the AZ401 or set the camera on a steady surface to take your photo or videos.