Since my update to LMTX 2021-12-03 the following error occured:
tex error > tex error on line 41 in file /Users/jan-erikhagglof/context/context-osx-64/tex/texmf-context/tex/context/modules/mkiv/m-database.mkiv: Missing \endcsname inserted
<to be read again>
\endlocalcontrol
<argument>
\c
!separator
<macro> \mult_interfaces_get_parameters_item_okay
#1=#2,->\ifarguments \or \mult_interfaces_get_parameters_item_error \else \defcsname \m_mult_interfaces_namespace #1
\endcsname {#2}\fi
<macro> \mult_interfaces_get_parameters_item
#*#1,->\ifarguments \else \mult_interfaces_get_parameters_item_okay #1,
\ignorearguments \expandafter \mult_interfaces_get_parameters_item \fi
<argument>
\c !separator={,},
\c !quotechar=, \c !commentchar=, \c !strip=\v !no, \c !before=, \c !after=, \c !first=, \c !last=, \c !left=, \c !right=
<macro> \mult_interfaces_get_parameters_indeed
#1]->\mult_interfaces_get_parameters_item #1
\ignorearguments \ignorearguments
...