JSTL in Glassfish vs. Tomcat

JSTL in Glassfish vs. Tomcat

I am trying to use the JSTL to iterate over a collection of objects. The
code works fine on my glassfish server, but when I deploy to tomcat, I get
an error:
org.apache.jasper.JasperException: An exception occurred processing JSP
page /errors.jsp at line 20 17
Line 20 is the line containing the h3 tag
<c:forEach var="currentError" items="${validationErrors}">
<h3><c:out value="${currentError}"/></h3>
</c:forEach>