blogdown::html_page() is built upon bookdown::html_document2() and some argument are passed to this base function - it is explained in the doc linked above
Which one of the error ? Inline highlighting not working ?
Highlighting in blogdown is highly dependent of the hugo theme you are using as their could be conflict with Pandoc's highligting because highligth.js is used in the theme. Sometimes, it is built-in like in this topic
You need to carefully read the documentation of your theme and add the necessary piece of code to activate inline highlighting with highlight.js if not supported by default for example.
I don't know how I can help much. I hope you'll find a solution !