(Running 2023.09.18 17:40 on Windows 11 x64) With \setupbodyfont[libertinus,11pt] \starttext Hello \stoptext I get no text output in the pdf and the following error reports: fonts > otf loading > loading 'G:/ConTeXt_LMTX/tex/texmf/fonts/data/public/libertinus/LibertinusSerif-Regular.otf', hash 'libertinusserif-regular' otf reader > fatal error in file 'G:/ConTeXt_LMTX/tex/texmf/fonts/data/public/libertinus/LibertinusSerif-Regular.otf': ...MTX/tex/texmf-context/tex/context/base/mkxl/font-dsp.lmt:2160: attempt to perform arithmetic on a nil value (global 'markset') stack traceback: ...MTX/tex/texmf-context/tex/context/base/mkiv/font-otr.lua:2344: in metamethod 'add' ...MTX/tex/texmf-context/tex/context/base/mkxl/font-dsp.lmt:2160: in upvalue 'readlookups' ...MTX/tex/texmf-context/tex/context/base/mkxl/font-dsp.lmt:2570: in upvalue 'readscripts' ...MTX/tex/texmf-context/tex/context/base/mkxl/font-dsp.lmt:2662: in local 'reader' ...MTX/tex/texmf-context/tex/context/base/mkiv/font-otr.lua:2089: in upvalue 'readtable' ...MTX/tex/texmf-context/tex/context/base/mkiv/font-otr.lua:2217: in upvalue 'readdata' ...MTX/tex/texmf-context/tex/context/base/mkiv/font-otr.lua:2257: in function <...MTX/tex/texmf-context/tex/context/base/mkiv/font-otr.lua:2240> [C]: in function 'xpcall' ...MTX/tex/texmf-context/tex/context/base/mkiv/font-otr.lua:2346: in upvalue 'loadfont' ...MTX/tex/texmf-context/tex/context/base/mkiv/font-otr.lua:2401: in field 'loadfont' ...MTX/tex/texmf-context/tex/context/base/mkxl/font-otl.lmt:160: in field 'load' ...MTX/tex/texmf-context/tex/context/base/mkxl/font-otl.lmt:625: in upvalue 'otftotfm' ...MTX/tex/texmf-context/tex/context/base/mkxl/font-otl.lmt:653: in function <...MTX/tex/texmf-context/tex/context/base/mkxl/font-otl.lmt:652> (...tail calls...) ...MTX/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:374: in function <...MTX/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:350> (...tail calls...) ...MTX/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:465: in field 'read' ...MTX/tex/texmf-context/tex/context/base/mkxl/font-ctx.lmt:1375: in function <...MTX/tex/texmf-context/tex/context/base/mkxl/font-ctx.lmt:1232> (...tail calls...) fonts > otf loading > loading failed due to read error -- Rik