The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/20afb035bdd360a3913f909c4488dc39.gif" -- '\Large t_{\text{K}^+}+t_{\text{Cl}^-}=1 '
returned status = 126
Image not found!
Please try the debugging script