Dear Hans,
I can’t believe it!
After updating ConTeXt, all the errors are disappeared!
Here is the beginning of the log file before updating:
…
This is LuaTeX, Version 1.0.3 (TeX Live 2017/dev)
system commands enabled.
open source > level 1, order 1, name '/Users/graph/ConTeXt/tex/texmf-context/tex/context/base/mkiv/cont-yes.mkiv'
system >
system > ConTeXt ver: 2017.01.27 14:39 MKIV beta fmt: 2017.2.16 int: english/english
system >
…
This is the current one:
"cont-yes.mkiv"
This is LuaTeX, Version 1.0.3 (TeX Live 2017/dev)
system commands enabled.
open source > level 1, order 1, name '/Users/graph/ConTeXt/tex/texmf-context/tex/context/base/mkiv/cont-yes.mkiv'
system >
system > ConTeXt ver: 2017.03.02 22:23 MKIV beta fmt: 2017.3.11 int: english/english
system >
Thank you and have a nice weekend.
Best regards,
Dalyoung