[NTG-context] Problem with latest

Hi everybody, The latest (2023.07.18 22:07) has a consistent problem with all files on my computer; every run has this: fatal lua error: registered function call [1715]: ...s/lmtx/tex/texmf-context/tex/context/base/mkxl/l-lua.lmt:84: attempt to call a nil value (upvalue 'popen’) Does anyone else see this as well? All best Thomas