Images are not appearing

Hi,
I am using the latest version of modules and Galleria plugin but I cannot see anything.
I have installed the Galleria library under sites/all/libraries/galleria so as sites/all/libraries/galleria/galleria-1.2.9.js,
then I have created an Option set and used this Option set in display field of the Image field ,where I want to show the Galleria slideshow.Finally nothing is appearing.
Am I missing something or this is a bug?
Also I take this message: " Fatal error: Could not extract a stage height from the CSS. Traced height: 0px. " (There is a height under Galleria settings,the default one) .
thanks