This XML document is invalid, likely due to invalid characters. XML error: Invalid document end at line 279, column 1

This XML document is invalid, likely due to invalid characters. XML error: Invalid character at line 619, column 31

A feed could not be found at http://flear.co.jp/inatomi/?feed=rss2. A feed with an invalid mime type may fall victim to this error, or SimplePie was unable to auto-discover it.. Use force_feed() if you are certain this URL is a real feed.

This XML document is invalid, likely due to invalid characters. XML error: Invalid document end at line 78, column 1