You'll need to install the
Adafruit_CircuitPython_Pioasm library on your CircuitPython board.
First make sure you are running the latest version of Adafruit CircuitPython for your board.
Next you'll need to install the necessary libraries to use the hardware--carefully follow the steps to find and install these libraries from Adafruit's CircuitPython library bundle. Our CircuitPython starter guide has a great page on how to install the library bundle.
Manually install the necessary library from the bundle:
Before continuing, make sure your board's lib folder or root filesystem has the adafruit_pioasm.mpy file copied over.