This doesn't work on the current version of Circuit Playground Express due to insufficient memory

When I tried running this on a new Circuit Playground Express, I got
Traceback (most recent call last):
File "code.py", line 62, in
MemoryError: memory allocation failed, allocating 184 bytes

According to Adafruit customer support, this is "due to the size of CircuitPython + Libs increasing and the M0 Express being strapped for memory". They recommended the Circuit Playground Bluefruit which has significantly more memory. I will test this code when I get the Circuit Playground Bluefruit. Is the code on the Adafruit website current, or are there newer versions of anything I should install?

Start by reproducing the failure on the current Circuit Playground Express with the versions linked from the Adafruit website, focusing on code.py line 62 and the reported 184-byte allocation. Compare the required CircuitPython and library versions, then document whether the code can run on the Express or requires the Bluefruit hardware.

Written by the indexing model from the issue text.