Hello, I'm having the same problem. Anyone has a solution to this? I have just opened a webshop and it'd be important that I can make the sitemap and get the sites indexed to Google as soon as possible.
I have added the following lines to my regenerated .htaccess file (my host tells this is to enable mod_rewrite-module):
Options +SymLinksIfOwnerMatch
RewriteEngine On
and I have also tried adding:
Options -Multiviews
When I generate sitemap it gives: "This XML file does not appear to have any style information associated with it. The document tree is shown below."
And then Google says: "Empty Sitemap, Your Sitemap does not contain any URLs. Please validate and resubmit your Sitemap."
It seems to make a sitemap without the friendly URLs, just like before enabling them, but this one doesn't work.
Any help very much appreciated!