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Cause 1: A project is not opened or imported using QAS or it was edited using some other tool.
Cause 2: If user does not have read-write access to the workspace.
Solution1 Solution : If project is not a QAS project then import the it instead of opening it from file menu. This will create a .project file.
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The user can also create a new project if he does not want to use the same workspace.
Solution2
Cause 2: If user does not have read-write access to the workspace.
Solution : If user does not have read-write access to the workspace then he needs to contact to his IT admin.
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