Theme Interface pro Revolution slider

I am using Theme Horse Interface Pro for my WP site and have set up a number of sliders using the revolution slider. I want to edit slides to put a layer with text on top of a photo. I can use the simple button function but don’t like the look of the limited selection. I tried to edit the style which supposedly gives a wide range of options of color, fonts , size etc. But I always end up with a simple black text that is very small, almost too small to read. A friend who knows a bit more about WP than me is using the same Theme and revolution slider and it works for him! We even copied the settings for the style he customized and put it into my revolution slider and it still doesn’t work. A small window states that there is an “ajax error” and a “parser error”. Towards the top pf the page I see the following message: Warning: file_get_contents(/homepages/14/d26455562/htdocs/app534228519/wp-content/plugins/revslider/rs-plugin/css/dynamic-captions.css): failed to open stream: No such file or directory in /homepages/14/d26455562/htdocs/app534228519/wp-content/plugins/revslider/inc_php/revslider_operations.class.php on line 694
{“success”:true,”message”:””}