Change the CSS does not work, because the error is not in the styles. It's on the way to invoke the cycle function and its assignment to the element you want to animate.
They should change this:
jQuery(document).ready(function($) {
$("#<?php echo $this->id; ?> ul").cycle({fx: "fade", timeout: <?php echo $cycletimeout; ?>});
});By this:
jQuery(document).ready(function($) {
$(".wpinstagram").cycle({fx: "fade", timeout: <?php echo $cycletimeout; ?>});
});