The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/28e7a2890ac828b1b927070e3206768a.gif" -- '\Large \displaystyle E=E_{\text{Fe}^{2+}/\text{Fe}}^0+ \frac{RT}{2F} ln\left(c_{\text{Fe}^{2+}}\right) '
returned status = 126
Image not found!
Please try the debugging script