Tabs in UWL main page

[Srinivas VELMA]

Hi All,
 
There is only one tab in the main page of UWL. Previously we used to have four tabs in UWL. 
I do not know how they disappeared in staging and production environments. But in development environment, we still have four tabs. 
My issue now is to add tabs like Tasks, Alerts,Notifications in UWL.
I had tried two ways.
1) By Navigation Node: The drop down list in add Navigation Node is empty (in all-dev,staging and prodn)and again if still I try that way I'm getting 500 server error.
2) XML files of uwl.standard: I had compared the xml files in dev and staging. They are same.
Can you please let me know how I can solve this problem.
Thanks a lot.
 
 
Regards,
Anuradha.
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