error when i enter my url with or without www

[PrintPoint]

when i try to generate the sitemap using the www. or without i get error as follows
An error occured

There was an error while accessing the URL specified: <b>http://my [ External links are visible to forum administrators only ]</b>
Please make sure to specify the correct website URL and resubmit your request.


my domain is
[ External links are visible to forum administrators only ]
it is  joomla site and when i tried to generate a sitemap with a jooomla component i got only 1 page listed. Please help!

[XML-Sitemaps Support]

Hello,

I just tried and sitemap has been created with 41 pages: https://www.xml-sitemaps.com/details-www.printpointuk.com.html