Error while creating jira issue

WARNING: JIRA REST createIssue error: RestClientException{statusCode=Optional.of(400), errorCollections=[ErrorCollection{status=400, errors={issuetype=valid issue type is required}, errorMessages=[]}]}
Sep 07, 2016 12:45:58 PM hudson.ExpressionFactory2$JexlExpression evaluate
WARNING: Caught exception evaluating: prop.repositoryUrl in /. Reason: java.lang.reflect.InvocationTargetException
java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.commons.jexl.util.PropertyExecutor.execute(PropertyExecutor.java:125)
	at org.apache.commons.jexl.util.introspection.UberspectImpl$VelGetterImpl.invoke(UberspectImpl.java:314)
	at org.apache.commons.jexl.parser.ASTArrayAccess.evaluateExpr(ASTArrayAccess.java:185)
	at org.apache.commons.jexl.parser.ASTIdentifier.execute(ASTIdentifier.java:75)
	at org.apache.commons.jexl.parser.ASTReference.execute(ASTReference.java:83)
	at org.apache.commons.jexl.parser.ASTReference.value(ASTReference.java:57)
	at org.apache.commons.jexl.parser.ASTReferenceExpression.value(ASTReferenceExpression.java:51)
	at org.apache.commons.jexl.ExpressionImpl.evaluate(ExpressionImpl.java:80)
	at hudson.ExpressionFactory2$JexlExpression.evaluate(ExpressionFactory2.java:74)
	at org.apache.commons.jelly.expression.ExpressionSupport.evaluateRecurse(ExpressionSupport.java:61)
	at org.apache.commons.jelly.expression.ExpressionSupport.evaluateAsString(ExpressionSupport.java:46)
	at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.buildAttributes(ReallyStaticTagLibrary.java:111)
	at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:95)
	at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)
	at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)