If you’ve recently made manual changes to your theme’s functions.php file, then there may be a code formatting issue creating the error. home/xyz//wp-includes/feed.php on line 67 home/xyz//wp-content/themes/twentyseventeen/functions.php:428) in Line Number 4, Column 1: Warning: Cannot modify header information – headers already sent by (output started at Typical error messages include: XML Parsing Error: XML or text declaration not at start of entity Missing line breaks or additional tabs in the XML code can cause errors to occur. WordPress renders RSS feeds in a language called XML. Note that not all web browsers support the native viewing of RSS feeds, so your first step is to ensure that you’re accessing the feed using a supported RSS client. If you experience errors when accessing your WordPress site’s RSS feed, it’s usually due to formatting issues.
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