Error using hyperref and tex4ebook

\documentclass[ebook,12pt,oneside,openany]{memoir}\usepackage[utf8]{inputenc}\usepackage{graphicx}\usepackage{xurl}\usepackage[hyperindex=true]{hyperref}\hypersetup{    colorlinks   = true, %Colours links instead of ugly boxes    urlcolor     = blue, %Colour for external hyperlinks    linkcolor    = blue, %Colour of internal links    citecolor   = red %Colour of citations}\title{Test}\author{Author}\date{}\begin{document}    \maketitle      \frontmatter        \tableofcontents \newpage       \mainmatter         \pagenumbering{arabic}    \chapter{New Chapter}    I am citing a book \footnote{sample footnote}.    \backmatter     \end{document}

I get following error message.

! LaTeX Error: No counter 'Hfootnote' defined.See the LaTeX manual or LaTeX Companion for explanation.Type  H <return>  for immediate help. ...                                      

My .mk4 file is as follows:

Make:htlatex {}Make:htlatex {}