error on line 2 at column 6: XML declaration allowed only at the start of the document

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Asked: June 17, 2025In: WordPress

The error “error on line 2 at column 6: XML declaration allowed only at the start of the document” (Solved!)

White space issues in WordPress files, “error on line 2 at column 6: XML declaration allowed only at the start of the document” especially in functions.php and wp-config.php, can cause the readed “Headers already sent” error. This happens when there are spaces, line ...