Problems with column sets?

["T. Kurt Bond via ntg-context" <ntg-context@ntg.nl>]

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Given the following file that uses definecolumnset and
startcolumnset/stopcolumnset (largely from the wiki
<https://wiki.contextgarden.net/Command/definecolumnset>) for input:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setuppapersize[letter]
\definecolumnset[TwoColumns][n=2]
\startcolumnset [TwoColumns]
  \title{Test page}
  \framed
    [frame=off,
     bottomframe=on,
     width=\textwidth,
     frameoffset=1mm,
     foregroundstyle=small,
    ]{\copyright\ \date[][year] Donald E. Knuth}
  \input knuth
\stopcolumnset
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Why does context fail, producing an empty .log and .pdf, with the following
information to the terminal:

resolvers       | formats | executing runner 'run luametatex format':
/usr/local/sw/versions/context-osx-64/tex/texmf-osx-64/bin/luametatex
--jobname="./x.ctx"
--fmt=/usr/local/sw/versions/context-osx-64/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex/cont-en.fmt
--lua=/usr/local/sw/versions/context-osx-64/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex/cont-en.lui
 --c:currentrun=1 --c:fulljobname="./x.ctx" --c:input="./x.ctx"
--c:kindofrun=1 --c:maxnofruns=9
--c:texmfbinpath="/usr/local/sw/versions/context-osx-64/tex/texmf-osx-64/bin"
system          >
system          > ConTeXt  ver: 2022.05.11 11:36 LMTX  fmt: 2022.5.24  int:
english/english
system          >
system          > 'cont-new.mkxl' loaded
open source     > level 1, order 1, name
'/usr/local/sw/versions/context-osx-64/tex/texmf-context/tex/context/base/mkxl/cont-new.mkxl'
system          > beware: some patches loaded from cont-new.mkiv
close source    > level 1, order 1, name
'/usr/local/sw/versions/context-osx-64/tex/texmf-context/tex/context/base/mkxl/cont-new.mkxl'
system          > files > jobname './x', input './x.ctx', result './x'
fonts           > latin modern fonts are not preloaded
languages       > language 'en' is active
open source     > level 1, order 2, name './x.ctx'
mtx-context     | fatal error: return code: 1

-- 
T. Kurt Bond, tkurtbond@gmail.com, https://tkurtbond.github.io

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