30 error messages

My URL is http://www.Livinggreenreviews.com
Today I received 30 of the below message. Does anyone know what this is or what I am supposed to do?
Thank you.

WordPress Firewall has detected and blocked a potential attack!
Web Page: livinggreenreviews.com/wp-content/themes/OptimizePress/lib/admin/media-upload.php
Warning: URL may contain dangerous content!
Offending IP: 190.79.157.73 [ Get IP location ]

Offending Parameter: imgpath = ../../../../uploads/optpress/images_comingsoon

This may be a “Directory Traversal Attack.”

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