All tasks added in the backlog disappeared from the board.

[Sonu Kumar]

I had added tasks in the backlogs, not started the sprint yet. It disappeared now from the backlog.

Now When I'm opening the issue it says " You do not have permission to view this work item". Could you help me here?

[Tuncay Senturk _Snapbytes_]

“You do not have permission to view this work item”, this error message clarifies that the issues you added to the backlog haven’t actually disappeared, but you’ve lost visibility because of permissions or issue security. 

- Check project permissions and see if you have Browse Projects or View Issues permission.

- Check issue security scheme if you have. They may have been assigned to a security level which may hide them.

- The backlog is driven by the board filter, so double check the board filter

I hope this helps