Thread:Project:Support desk/error when update the images

hi, i have one media wiki site, and sudenly apear a mensage in the thum place, when i upload a image. with this error:

Erro ao criar miniatura (eeror create thumbail): sh: /usr/bin/convert: No such file or directory

this never hapens, and i dont change anything in the site.

how i solve this?

tks alot