Running notion2md results in error statement: ERROR 'text'

Using notion2md version 2.7.6
Ubuntu 20.04
Python version 3.8.10

Notion page content (exported to markdown)
Test page 19d3bdf4aade48438defa1b44d18031a.md

I've also tried calling the StringExporter() function from within a Python script and get the exact same error.
Traceback ends at line 39 with KeyError: 'text'