The World-Wide-Web Consortium now regards the element 'element' as outdated. Newer constructs are recommended.

The older HTML element named in the message has been deprecated by the World-Wide-Web Consortium. As their HTML 4.01 Specification explains at 4 Conformance: requirements and recommendations:

A deprecated element or attribute is one that has been outdated by newer constructs.

Appendix A of the HTML 4.01 Specification gives the following list of deprecated HTML 3.2 elements that should be replaced by newer constructs:

APPLET
BASEFONT
CENTER
DIR
FONT
ISINDEX
MENU
S
STRIKE
U.

To correct this error

• Replace the deprecated element with a newer HTML construct.