Provide us with WP Dashboard access to your site to check the Revolution slider settings and give you correct answer. It seems that you added some custom height or set the wrong grid height and it causes the issue. I’ll be able to tell you the reason after checking the settings.
We were able to fix the slider height but it seems that the Transposh Translation Filter plugin causes error in console http://prntscr.com/sjkqim and it breaks the slider. So, I have disabled plugin. Check the slider and let me know if this is ok for you. Also, contact plugin author to fix the mentioned errors to use the plugin in the future.