the error type is:
Reference to entity ... for which no system identifier could be generated
in general joomla produces an URL of this type:
Good <a href="
www.domain.com/cgi?x=123&y=456
">
instead of the correct one
Good <a href="
www.domain.com/cgi?x=123&y=456
">
The error is signaled on line 181 of the page.
Can you explain me how to solve the problem?