footnotedistance key undefined error in mdframed

My preamble is as follows:

\documentclass{book}
\usepackage{xcolor}
\usepackage[framemethod=default]{mdframed}
\usepackage{lipsum}

\newmdenv[skipabove=7pt,
skipbelow=7pt,
rightline=false,
leftline=true,
topline=false,
bottomline=false,
backgroundcolor=black!10,
linecolor=black,
innerleftmargin=12pt,
innerrightmargin=12pt,
innertopmargin=12pt,
innerbottommargin=12pt,
splittopskip=16.5pt,
splitbottomskip=12pt,
leftmargin=0cm,
rightmargin=0cm,
footnotedistance=22pt,
linewidth=4pt]{dBox}
\begin{document}

\begin{dBox}
\lipsum[1]
\end{dBox}

\end{document}


I got the error Package kvsetkeys Error: Undefined key footnotedistance.

If I comment the line footnotedistance=22pt, then it works fine, The version of mdframed what I use is Package: mdframed 2013/07/01 1.9b: mdframed, please suggest what went wrong in my code...

Hope, it may require update of mdframed...

There's a typo in the documentation (or rather, in the code). The documentation says footnotedistance, but the code actually defines footenotedistance, with the extra e. The code should work if you change that.
This is unlikely to be fixed, as the last activity in the mdframed GitHub was in 2014, but I filed an issue anyway.