This problem may be caused by importing a View that includes a custom sort. To confirm if this is the case launch Open Workbench, and right click on the View in your Library. Click "Edit".
On the "View Definition" screen go to the "Sort" tab, and see if any fields are present. If so you will need to delete and recreate the Sort.
Release : Any
Component : CA PPM APPLICATION
1. Right click on the view
2. Click Edit
3. Click on the Sort tab
4. Note the information in the Sort fields, you will need to recreate the Sort, so having the information will be helpful
5. Select each line and press the "Delete" button on your keyboard to remove all lines on the Sort. Only one blank line should remain. Click "OK"
6. Save the changes and confirm the View now works.
7. You can then attempt to re-add the Sort information that you noted in step 4. Save, and it should now work.
The Documentation for Open Workbench and how to create Views is located here: