error on line 3 at column 6: XML declaration allowed only at the start of the do

I’m having the same problem.

Me too, I’m having the same problem. I can’t find any resource talking about this.

Can anyone provide a link to the sitemap with errors so I can take a look please?

I found the problem, the problem was that when generating the xml is generated with blanks before the declaration of the same I did was check the php files that might be adding spaces and remove, so you fix the problem.

Yes most of the time there are other plugins/themes that output spaces before the sitemaps are generated, which cause the error above. Is this option “Clean unexpected output before sitemap generation?” in the Sitemap Generator enabled for you guys? If not please enable it, it might help.

Solved for me now

For my problem, I got first blank line not only in sitemap, but also RSS feed. So, I read from this link to fix and it’s working now.

https://www.piotrkrzyzek.com/wordpress-remove-blank-line-from-rss-feed-wordpress-error-on-line-2-at-column-6-xml-declaration-allowed-only-at-the-start-of-the-document/

@nattyait That Worked Thanks !