Validation fails for sitemap input

[OliverWoolland]

Trouble validating sitemaps has been reported by Bioschemas community member Alisdair Gray.

[AlasdairGray]

The first sitemap I tried (https://disprot.org/sitemap.xml) is an index of sitemaps.

<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  <sitemap>
    <loc>https://disprot.org/sitemap1.xml.gz</loc>
  </sitemap>
  <sitemap>
    <loc>https://disprot.org/sitemap2.xml.gz</loc>
  </sitemap>
</sitemapindex>

This returned an error

TypeError: 'FileNotFoundError' object is not subscriptable
Traceback:
File "/usr/local/lib/python3.10/site-packages/streamlit/scriptrunner/script_runner.py", line 443, in _run_script
    exec(code, module.__dict__)
File "/validator/website_st.py", line 102, in <module>
    markdown_text = report.generate_report_summary(result)
File "/validator/web/report.py", line 10, in generate_report_summary
    ##### {fmt.header("Against profile:")}  {result['Profile Name']} {result['Profile Version']}

I then tried one fo the nested sitemaps which is a sitemap of URLs. This eventually timed out with no error from what I could see.