Drupal XMLSiteMap: public://xmlsitemap/ not found or not writable
I ran into the following error (or something like it) while setting up Drupal's xmlsitemap module:
public://xmlsitemap/lOtsOfgoBBlDegOOk not found or not writable
This is as expected some kind of permissions issue. Why the module can't sort this on its own, I do not know. As with everything Drupal, clear the cache first to see if that fixes things. It sometimes does. If not, you will need to get your hands dirty on the commandline (if linux):