Hello,
Thank you for contacting the support and sorry for any inconvenience that might have been caused due to that.
The error suggests that there are some white spaces or blank lines in your wp-config.php or functions.php file.
Here’s a guide with more details:
https://rankmath.com/kb/fix-sitemap-issues/#xml-text-declaration
Please remove the blank line/space from the above files and after clearing the website and browser’s cache, see if the sitemap loads.
Let us know how that goes.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.
