The shell command
"/lrn-mdl-prod/build/75217/filter/tex/mimetex.linux" -e "/lrn-mdl-prod/moodledata/filter/tex/fe0c312fdafb8747f03442a71e005f6a.gif" -- '\Large f_t = \sigma(W_{fh}h_{t-1} + W_{fx}x_t + b_f)'
returned status = 1
Image not found!
Please try the debugging script