Files that ran well with ver ConTeXt  ver: 2021.02.20 16:50 LMTX and earlier now fail with the following message:

tex error       > tex error on line 74 in file c_Review-0201-01_Bojowald.tex: 

lua error:
run callback [36]: [string "/Applications/LuaMetaTeX/tex/texmf-context/te..."]:1343: attempt to concatenate a boolean value (local 'v')
stack traceback:
[string "/Applications/LuaMetaTeX/tex/texmf-context/te..."]:1343: in local 'w'
[string "/Applications/LuaMetaTeX/tex/texmf-context/te..."]:1358: in function <[string "/Applications/LuaMetaTeX/tex/texmf-context/te..."]:1353>

64     \startparagraph
65     Some facts are compiled in the synthesis. The representations and inscriptions in the stair­wells and kiosk show parallels to other cult buildings [702]. In several cases there are allu­sions to the ritual Opening of the Mouth [702].
66     \stopparagraph
67     
68     \startparagraph
69     In the synopsis, selected texts are compared [711–725]. The parallels are clearly arranged.
70     \stopparagraph
71     
72     \startparagraph
73     The book contains bibliography [737–765], indices [767–809], tables [1a–41b], and color tab­les [1–7].
74 >>  \stopparagraph

Is this a bug or has something changed that I am uns=aware of yet?

Alan