Error with 20211008 ConTeXt:
ConTeXt ver: 2021.10.08 20:18 LMTX fmt: 2021.10.9 int: english/english
...
tex error > tex error on line 1 in file ./mmm.tex: Undefined
control sequence \??markingfilter
<argument>
\csname \??markingfilter
\v!default \endcsname {chapter}
<macro> \sectionheadmarkingtitle
#1#2->\clf_markingtitle {#1}{#2
}
<macro> \strc_markings_get_yes
...rking \begincsname \??markingclass #1\endcsname {#2}{#3}}\fi
\orelse \ifparameter #2\or \markingcommand {#1}{\csname
\??markingfilter #2\endcsname {#1}}\else \markingcommand
{#1}{\csname \??markingfilter \v!default \endcsname {#1}}
\fi \endgroup ...
<to be read again>
\fi
<macro> \page_layouts_process_element_indeed
...andcolor #1#2\begincsname \??layouttextstrut
\layoutelementparameter \c!strut \endcsname \ignorecrlf \edef
\p_width {\layoutelementparameter #3}\ifempty \p_width \else
\expandafter \page_layouts_process_element_limited \fi \p_text
\endgroup
<macro> \currentlayoutelement
...kern -\makeupwidth \fi \letfromlayoutelementparameter
\p_text \c!righttext \ifempty \p_text \kern \makeupwidth \else \hbox
to \makeupwidth \bgroup \hss \page_layouts_process_element_indeed
\c!rightstyle \c!rightcolor \c!rightwidth
\egroup \fi
...