The line in question in the code is:
$link = apply_filters( "wpseo_" . $rel . "_rel_link", "<link rel=\"$rel\" href=\"$url\" />\n" );On this page:
http://www.cyclingutah.com/category/sport-and-touring/road-–-sport-and-touring/page/2/
The full error message is:
Warning: rtrim() expects parameter 1 to be string, object given in /home/cyclingutah1/cyclingutah.com/cms/wp-includes/formatting.php on line 1381
Catchable fatal error: Object of class WP_Error could not be converted to string in /home/cyclingutah1/cyclingutah.com/cms/wp-content/plugins/wordpress-seo/frontend/class-frontend.php on line 713