This error i got on web.xml file on my error-page tag:
cvc-complex-type.2.2: Element 'location' must have no element [children],
And my web.xml file looks like below (Not shown other tags) :
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_3_0.xsd" version="3.0"><error-page> <error-code>404</error-code> <location>/pages/error/404.jsp</location> </error-page> </web-app>