I just installed this for a client and am getting this error when I click on the RSS buttoon:

Warning: fopen(/rssfeed_xxxxxxxxxxxxxxx): failed to open stream: Permission denied in /home/content/dbname/html/websitecom/includes/classes/rss_feed.php on line 346
Warning: Cannot modify header information - headers already sent by (output started at /home/content/dbname/html/websitecom/includes/classes/rss_feed.php:346) in /home/content/dbname/html/websitecom/includes/classes/rss_feed.php on line 353
Warning: Cannot modify header information - headers already sent by (output started at /home/content/dbname/html/websitecom/includes/classes/rss_feed.php:346) in /home/content/dbname/html/websitecom/includes/classes/rss_feed.php on line 354
Warning: Cannot modify header information - headers already sent by (output started at /home/content/dbname/html/websitecom/includes/classes/rss_feed.php:346) in /home/content/dbname/html/websitecom/includes/classes/rss_feed.php on line 355
Warning: Cannot modify header information - headers already sent by (output started at /home/content/dbname/html/websitecom/includes/classes/rss_feed.php:346) in /home/content/dbname/html/websitecom/includes/classes/rss_feed.php on line 356

I've looked at the codes and don't see any blank spaces at the end of the lines in error. What am I missing here.

FYI - just under the errors I am seeing the product information.