The shell command"/lrn-mdl-prod/build/71384/filter/tex/mimetex.linux" -e "/lrn-mdl-prod/moodledata/filter/tex/8e48dd34b6ee813b06da16e36db3e840.gif" -- '\Large \varphi=\pi/2'returned status = 1 Image not found!Please try the debugging script