Cryptic summary for following scenario
- Go on a release "overview"
- Click on an artifact
- Edit it
- Click on submit
- => artifact is updated but you are redirected toward the 404 error page
As the URL looks like https://X/plugins/agiledashboard//?group_id=X&planning_id=X&action=show&aid=X&pane=details (notice the double /) I strongly suspect a regression introduced by request #13030