Hi,
I'm trying to import a CSV into a blank JIRA project. I have tried both with team-managed and company-managed projects.
This is my CSV:

This is the mapping when I import to JIRA (from System > External System Import > CSV):

This is the error on importing:

The issues are imported as a flat list, without any links. Ideally they should follow the Epic > Story/Task > Subtask. Here's the screenshot:

I've gone through numerous other support questions where people faced the same issue, but I was not able to get it working for me.
Any help would be appreciated. Thanks!