CSS Help

i really struggle with CSS.
Please see this page
https://stevelescure.net/quote-rotator-test-page/
I do an inspect element on the rotating quote box (displayed by the plugin i’m working on) and it shows something like below, which looks ok:

#quotearea {
background: url(images/wide-rounded.gif) center center no-repeat;
width: 500px;
height: 70px;
padding: 12px 50px 0 50px;
margin: 15px auto;
}

However, the wide-rounded.gif doesn’t seem to be showing. It should have large white quotation marks in the background. the image IS in /images.

i see the stylesheet that defines #quotearea when i view the page source.

link rel=”stylesheet” href=”https://stevelescure.net/myhome/wp-content/plugins/flexible-quote-rotator-plus/styles/wide-rounded.css” type=”text/css” media=”screen” />