After doing just now the standard: sh install.sh context will not run. Why, because in the past it worked without a hitch.
Now there is no format cont-en.

Did all sorts of the ususal things like remove the current cache, context --make en, etc.

I guess the error is in the missing file. An overfsight somewhere?
Below the last part of the context --make en run.
Mark the lang-mis.mkxl is not found line.

met vriendelijke groet
dr. Hans van der Meer

resolvers       > lua > loading file '/Users/hansm/TeX/context-lmtx/tex/texmf-context/tex/context/base/mkiv/node-bck.lua' succeeded
close source    > level 1, order 83, name 'node-bck.mkiv'
open source     > level 1, order 84, name 'pack-cut.mkiv'
close source    > level 1, order 84, name 'pack-cut.mkiv'
runtime error : input file 'lang-mis.mkxl' is not found, quitting
resolvers       | formats |
resolvers       | formats | binary path      : /Users/hansm/TeX/context-lmtx/tex/texmf-osx-64/bin
resolvers       | formats | format path      : /Users/hansm/TeX/context-lmtx/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex
resolvers       | formats | luatex engine    : luametatex
resolvers       | formats | lua startup file : /Users/hansm/TeX/context-lmtx/tex/texmf-context/tex/context/base/mkiv/luat-cod.lua
resolvers       | formats | context file     : /Users/hansm/TeX/context-lmtx/tex/texmf-context/tex/context/base/mkiv/cont-en.mkxl
resolvers       | formats | run time         : 0.499 seconds
resolvers       | formats | return value     : error
resolvers       | formats |
system          | total runtime: 0.500 seconds of 0.604 seconds