You don’t need to specify display conditions in there as Jira doesn’t allow non-admin users accessing that page. So please try removing it and check whether it works.
The second thing that might help is upgrading app’s permisisons. Please run in the terminal:
Thanks, I’ve verified this fixed the symptom. It’d be great to clarify that displayConditions is not needed for jira:adminPage in the reference. Ideally, though, I want the original manifest work as is because it’s more intuitive.