When does this appear, when the screen opens, or when you click on a function? Can you click on any functions? Is it possible to set any profile options?
You should review fnd_log_messages order by timestamp desc to see if there are any clues there.
This occur when I try to open requests screen to submit reports or any request .
In other words the Requests screen is not opening
If this is the same instance with all of the FND invalid objects, those will have to be resolved before you have a working instance.