The shell command
"/srv/www/0003_site/releases/4.1.17-6-dev/filter/tex/mimetex.linux" -e "/srv/www/0003_site/media/media_moodle/filter/tex/7b774effe4a349c6dd82ad4f4f21d34c.gif" -- '\Large u'
returned status = 126
Image not found!
Please try the debugging script