Pages are not display properly if viewed offline

if I use the theme and do 'mkdocs serve' everything looks and acts great:.

but if I do 'mkdocs build' then trying to access that same page results in the following:


The image above was taken from our QWebEngine based html viewer (Basically Chrome). If I try the same site within Safari then the enclosing folder of the index.html file is opened up.

I use the "material" theme or the "mkdocs" theme I do not have these issues.

I like your theme because we have a large documentation project and the permanent navigation on the left side is extremely useful for navigation.