I see almost the same error.
error on line 2 at column 6: XML declaration allowed only at the start of the document
Just wanted to tag onto the end of this and see if it gets resolved and might remedy my “/sitemap_index.xml was not found on this server.” problem.
I’m getting an 404 when trying to view my site map. Any thoughts as to why I can get the the page? Has something changed in the update?
Thanks in advance
Here’s what I found out by disabling all plugins and activating one by one. A plugin of my own creation had some whitespace outside of the <?php ... ?>.
After fixing that plugin all works as expected. Additionally, when I activated that plugin I got the following error.
The plugin generated 1 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.
Strange as I don’t recall seeing this before.
