My name is Vasyl Khrystiuk‎ > ‎pub‎ > ‎html‎ > ‎

nbsp is not good (realy)

Tags: html_tag

This particular error is caused due to common HTML entities usage on XHTML outputs, which follows XML entities rules.
Basically means you are using a  -like entity, when in XHTML you should use a  -like entity;
The only named entities for XML are &, > and <. For all others you need to use the Unicode character code (eg.  ).