The function "getResourceValue" for prefix "wf" can not be found in the specified tag library.

Solution:
1. Check the JSPX page that the following namespace is available or not. Otherwise add this tag in jsp:root.
 xmlns:wf="http://xmlns.oracle.com/bpel/workflow/workflow-taglib.tld"

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1"
          xmlns:f="http://java.sun.com/jsf/core"
         xmlns:wf="http://xmlns.oracle.com/bpel/workflow/workflow-taglib.tld">

2. Still you have an issue?
Go to "Project Properties" --> "JSP Tag Libraries" --> check "workflow Tags 1.0" available or not.
Otherwise "add"  --> "Workflow Tags 1.0" -->"ok"