Message

Blank line before XML declaration (WordPress)

Explanation

If an XML declaration (<?xml ... ?>) appears in your feed, it must be the first thing in the feed, before any whitespace.

Unfortunately, with WordPress it seems all too easy for a plugin, a theme, or for your configuration file to contain a blank line. Further compounding this problem, some — but not all — feed readers compensate for this common error, allowing the error to go undetected for quite a while.

Solution

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