Since about a month ago, I have been receiving error reports from TinyTeX users saying “TinyTeX\bin\windows\runscript.tlu:864: no appropriate script or program found: fmtutil” or “I can’t find the format file `pdflatex.fmt’!”, which I do not understand.
For the last few days, I scratched my head, banged against the wall, did some research, asked R and LaTeX experts in mailing lists, got reminded of “[[alternative HTML version deleted]]” again (and …