No issue in any column (Company-managed project)
Issue
You use a Scrum project (Backlog & Active sprint enabled) in a Company-managed project and you cannot see any issue in any any columns

Planning Poker app has 0 issues
Possible root cause
You don’t have
Story Pointsfield configured in your Screen
Solution
Go to
Project Settings→ScreenIn each Screen setting for your issue type, add
Story PointsfieldGo back to Planning Poker app, you should be able to view issues in Backlog now!