Hi,
I've created a next gen project based on Kanban.
I've enabled Backlog in the project settings.
I've created a bunch of issues.
I now want to make one of the issues a child issue of an existing issue.
I open the parent issue, and click Add a child issue > choose an existing issue. The search/drop down box appears but is empty. Anything I type doesn't match to any issue, whether i type the issue number or something from its summary.
Is there another feature I need to enable in the project settings to make this work?