Apple M1 error when running run.sh - dlopen symbol not found

[dumbchildren]

the script stops when it tries to import lxml.etree:

import lxml.etree as ET
ImportError: dlopen(/opt/homebrew/lib/python3.8/site-packages/lxml/etree.cpython-38-darwin.so, 0x0002): symbol not found in flat namespace '_exsltDateXpathCtxtRegister'

Use Python 3.9 instead of 3.8.