An entity has been detected (a string beginning with "&"). And this entity is not known.
Very often this is due to a link defined like this:
![]() | <a href="http://www.domain.com/cgi?x=123&y=456"> |
![]() | <a href="http://www.domain.com/cgi?x=123&y=456"> |
All special characters in HREF should be encoded. "&" is a reserved character to begin an page.
Replace "&" by "&".