Error in Styled HTML with TOC


When I export markdown text in ‘Styled HTML with TOC’ format and view the html file in the browser, TOC is shown in the upper section of the page, not in the left section.

It has been working until yesterday without no problem showing TOC at the left side of browser, but I found the error today

Is there any change in

How can we fix this? If it was changed, I’d pleased if I can use the previous version of styled html with TOC.