BusinessObjects Board

Web Intelligence report error when trying to display prompt value from predefined cells

In Xi 4.2 Web Intelligence report we are getting HTTP status -400 Bad request error when trying to insert runtime prompt values from predefined cells.
In the type it says Exception Report
Message : Invalid character found in the request target …

There is no issue in running the report , the error is displayed only when we attempt to insert the prompt values from the predefined cell.