I have:

\framed

  [height=3em,

   width=.5\textwidth,

   foregroundcolor=red,

   framecolor=blue,

   rulethickness=2pt,

   background=color,

   backgroundcolor=green]

\starttext

{Ich bin da.\par Du auch}

\stoptext

The mistake after compiling:

Command Line:   context.exe --synctex=-1 "Frame ward.tex"

Startup Folder: \\ub.univie.ac.at\U_Dom\Users G-L\Hermann\Documents\My Documents

mtx-context     | run 1: luatex --fmt="C:/texlive/2018/texmf-var/luatex-cache/context/a86c089b384a3076dc514ba966a1fac9/formats/luatex/cont-en" --jobname="Frame ward" --lua="C:/texlive/2018/texmf-var/luatex-cache/context/a86c089b384a3076dc514ba966a1fac9/formats/luatex/cont-en.lui" --no-parse-first-line --c:currentrun=1 --c:fulljobname="./Frame ward.tex" --c:input="./Frame ward.tex" --c:kindofrun=1 --c:maxnofruns=9 --c:synctex="-1" "cont-yes.mkiv"

This is LuaTeX, Version 1.07.0 (TeX Live 2018/W32TeX)

 system commands enabled.

open source     > level 1, order 1, name 'C:/texlive/2018/texmf-dist/tex/context/base/mkiv/cont-yes.mkiv'

system          >

system          > ConTeXt  ver: 2018.04.04 00:51 MKIV beta  fmt: 2018.6.15  int: english/english

system          >

system          > 'cont-new.mkiv' loaded

open source     > level 2, order 2, name 'C:/texlive/2018/texmf-dist/tex/context/base/mkiv/cont-new.mkiv'

close source    > level 2, order 2, name 'C:/texlive/2018/texmf-dist/tex/context/base/mkiv/cont-new.mkiv'

system          > files > jobname 'Frame ward', input './Frame ward', result 'Frame ward'

fonts           > latin modern fonts are not preloaded

languages       > language 'en' is active

system          > synctex functionality is enabled, expect 5-10 pct runtime overhead!

open source     > level 2, order 3, name '//ub.univie.ac.at/U_Dom/Users G-L/Hermann/Documents/My Documents/Frame ward.tex'

fonts           > beware: no fonts are loaded yet, using 'lm mono' in box

system          > invalid \starttext ... \stoptext structure

tex error       > tex error on line 1 in file //ub.univie.ac.at/U_Dom/Users G-L/Hermann/Documents/My Documents/Frame ward.tex: ! You can't use `\end' in internal vertical mode

\dostoptext ... \writeline }\donothing \normalend

l.1 \dostoptext

\clf_stoptext ->\luafunction \16>>clf_stoptext

l.11 \stoptext

1 >>  \framed

2     [height=3em,

3     width=.5\textwidth,

4     foregroundcolor=red,

5     framecolor=blue,

6     rulethickness=2pt,

7     background=color,

8     backgroundcolor=green]

9     \starttext

10     {Ich bin da.\par Du auch}

11     \stoptext

?

I wanted to try some frames with text and paragraphs.  But there is something wrong, and I dont know why.

Many regards

Uschi