I have an Epic created in my JIRA project, and then I clicked "Add a child issue", and chose the type "Story" from drop down list and filled in other fields, then tried to save the issue (story), however it gave me the following error message
"You can only set epic links for issues on the Story level. Please check your hierarchy configuration settings."
I have issue type hierarchy setup as following:

Based-on the setting, the user story can be a child of epic. Not sure why I still got the error message and cannot create it as Child?
Thanks