If the camera keeps taking pictures continuously:

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

If the camera makes an error sound when taking a picture and the left LED blinks:

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