tfs - Sprint navigation doesn't show in Visual Studio Team Services -

while working on managing sprints in visual studio team services, sprint options on left pane has disappeared, therefore can't see previous , future sprint work items when select work items under backlogs tab.

any idea ?

i ran too, not find other links section. had following, there must better way isn't necessary.

1. go project's home page
2. click on gear icon enter settings area project
3. this should default overview tab, list of teams on right.
4. click on team
5. click on work tab
6. click on iterations sub tab
7. click on green plus sign add new iteration created previously