Doesn't work validador Groovy in case of creation task

[kate]

Doesn't work validador Groovy in case of creation task.

Code:

import com.googlecode.jsu.util.WorkflowUtils
import com.opensymphony.workflow.InvalidInputException
import org.apache.log4j.Category
 
log = Category.getInstance("com.onresolve.jira.groovy.OneOrOther")
log.debug("In Validator groovy script")
 
String sponsor = (String) WorkflowUtils.getFieldValueFromIssue(issue, WorkflowUtils.getFieldFromKey("customfield_10340")) ?: ""
 
if (! (sponsor == "")) {
    invalidInputException = new InvalidInputException("Must enter either a Sponsor OR a description")
}

Error:

Ошибка создания запроса: An unknown exception occured executing Validator com.onresolve.jira.groovy.GroovyValidator@3e19d3ac: root cause: java.lang.NullPointerException

Other scripts (not validators) work perfectly.

Help to solve a problem.

[JamieA]

Should work fine. I would do it without the JSU plugin... you don't need it.