Can´t see thumbnail images

Thumbnail images are not displayed. I have OMEKA Classic 3.0.3 installed and also image magick in LINUX . I appreciate help .
Thank you in advance
Cecilia Valenzuela
Instituto de Higiene, Library

I’m also having this problem. The user manual indicates that image magic should already be installed and I’ve not encountered this problem before, but images aren’t showing up.

Oops! I found the issue! One must put /usr/bin into the field under settings for Image Magic.
Hope this helps.