Script Field - Script not working after migration

[Gerald Whittaker]

Recently migrated to Jira Datacenter version from Jira Server.  On Jira Server Adaptavist Scriptrunner was populating a scripted field (Sum of all Story Points on Story Issue for all Epics using the epic story link) using the script below.   Since installing Adaptavist Scriptrunner on Jira Datacenter it is not working.  Any suggestions?

import com.atlassian.jira.component.ComponentAccessor

def doneNames = ["START WORK"]
def issueLinkManager = ComponentAccessor.getIssueLinkManager()
def totalSP = 0.0
enableCache = {-> false}

def customField1 = ComponentAccessor.getCustomFieldManager().getCustomFieldObjectByName("Story Points")

issueLinkManager.getOutwardLinks(issue.id).findAll {
it.issueLinkType.name == "Epic-Story Link"
}.findAll {
!(it.destinationObject.status.name in doneNames)
}.each {
totalSP += it.destinationObject.getCustomFieldValue(customField1) as Double ?: 0.0
}

return totalSP as Double