Unable to create an updated file

When I go to regenerate the LLMs.txt file I get the following warning message.

Generation failed: <p>There has been a critical error on this website.</p><p><a href=”https://wordpress.org/support/article/faq-troubleshooting/”>Learn more about troubleshooting WordPress.</a></p>

The site is working perfectly, it simply won’t generate a new LLM file.