导出时报错

[liuss77]

TypeError: 'NoneType' object is not iterable
Traceback:
File "/app/.heroku/python/lib/python3.6/site-packages/streamlit/ScriptRunner.py", line 319, in _run_script
exec(code, module.dict)
File "/app/notion-md-exporter.py", line 187, in
notion_markdown_export(token_v2, url, directory)
File "/app/notion-md-exporter.py", line 134, in notion_markdown_export
for children_id in page.get("content"):