When I visit sitemap.xml of my WordPress website I see this error. Here is the imageenter image description here

closed as off-topic by Nathan Johnson, rudtek, Andy Macaulay-Brook, bosco, Rick Hellewell Mar 30 at 0:21

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This is probably due to empty lines inside your custom php files. Try checking every php file you edited for empty lines after the ?> closing tag: the tag should be the last character of any file.


I look for empty lines inside every PHP files but I didn't find any but at last, I found the solution the error was due to a function which I declare in my functions.php file, the function was register_sidebar(); but I was not using it in my theme anywhere. When I removed this function in my functions.php file then sitemap.xml of my website working correctlyenter image description here

  • so if you have the same issue you should also check your functions.php file may be the error is due to any function you declare in your theme's functions.php file. – Khalil Mar 15 at 13:35

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