Tested on Circuit Playground Bluefruit running Adafruit CircuitPython 7.2.5 on 2022-04-06; Adafruit Circuit Playground Bluefruit with nRF52840 Library Bundle used was adafruit-circuitpython-bundle-7.x-mpy-20220422
Any instance of from adafruit_circuitplayground.express import cpx
must be changed to
from adafruit_circuitplayground.bluefruit import cpb
Subsequently any call of cpx
must be changed to