If the camera keeps taking pictures continuously:

Batteries are incorrectly placed or discharged.
If they are incorrectly placed, simply remove the batteries and put them back in.
If you have rechargeable batteries, you can connect the camera with the USB cable to power and  charge the batteries. If your batteries are not rechargeable, you will need to replace them.

If the camera gives an error sound when taking a picture and the left LED flashes:

There is a problem with the SD card.
It may be full, misplaced, or have more memory than PaperShoot supports.