SYMPTOM
Menu bar, Toolbar and Object Browser panel disappears when running a report with a certain attribute in Strategy Web 10.x
When a certain report or the report with the certain attribute is executed from Strategy Web, it is observed that the menu bar, toolbar and object browser panel disappeared as below:

The report could not be edited in Strategy Web either.
However, the execution and edit from Developer work fine.
There are no related error messages in DSSErrors or Web log files.
CAUSE
It might be caused by the line-break in attribute name.
When browsed in All object panel, the problematic attribute is displayed as below with <br> in the name:

When the attribute name is copied and pasted to Notepad, it contains a line-break.

ACTION
Remove the line-break from the attribute name.
KB441530