Lyx Stops at HTML Validation Errors

I tried some updates of the Green Technology Strategies course using using Lyx, but not all of my document was imported correctly from HTML. It appears that Lyx is sensitive to errors in the HTML and stops conversion when it finds them (with no warning that something went wrong). What was more surprising was that these errors were created by Moodle's Book Module, converting to IMS Content Package format. This allowed me to create an empty ordered list:

Correcting the errors resulting in Lyx finishing the conversion.