Can not import Cucumber features using XRAY plugin for Jenkins

[Erantha Welikala]

I am using Xray - Test Management for Jira Plugin. With the help of this plugin currently I was able to imoprt the test execution results to JIRA using the 

step([$class: 'XrayImportBuilder'])

But I am unable to import the cucumber features to JIRA using the corresponding class of the same plugin

step([$class: 'XrayImportFeatureBuilder'])

Here is code I am using for this task,

step([$class: 'XrayImportFeatureBuilder', folderPath: "${folderPath}", lastModified: '', projectKey: "${PROJECT_KEY}", serverInstance: "${env.XRAY_CONFIG_IG}"])

NOTE: folderPath, PROJECT_KEY and env.XRAY_CONFIG_IG are defined before this step.

Here is the output of the above sterp...