CurrentHierarchyMember.Key

Hello,
I am trying to build this report in my account: Issue burn-down in epic - Issues - Jira Demo - eazyBI

The report does not import directly because my data cube uses Feature link, not Epic link. I tried building the measures that the report uses individually. When building the ‘Epic end date’ measure, my account does not produce (have as an option) ‘CurrentHierarchyMember.Key’. The .Key is not an available option after CurrentHierarchyMember.

In this string I am replacing Epic Link with Feature Link: Descendants([Issue.Epic].[Epic].GetMemberByKey([Epic Link].CurrentHierarchyMember.Key

Thanks, Seth