[bluenote2]

The sitemaps are stored under forum-root/vbseo_sitemaps/data

Google writes in its FAQ:

Denied URLs
Google has detected some URLs that appear to be at a higher level or different domain than the Sitemap file location. Note that you will not see all denied URLs listed. Rather, Google lists three of them to give you an idea of what types of URLs are being denied. If you receive this error, try moving your Sitemap file to a higher location in your site and submitting again. For instance, if your Sitemap is listed under http://www.example.com/mysite/sitemap.xml, the following URLs are not valid for that sitemap:

http://www.example.com/ - it's at a higher level than the Sitemap
http://www.example.com/yoursite/ - it's in a directory parallel to the Sitemap
http://www.example.com/mysite/yoursite - it's missing the trailing slash

https://www.google.com/webmasters/si...bmit.html#ping

That seems to be a major problem, doesn't it?