CA PPM Error when a user attempts to go to Resource Planning

Document ID : KB000102779
Last Modified Date : 21/06/2018
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One user has a problem when clicking on "Resource Planning" page from the home menu, they get an error message  - "Unable to Process Request - server or network error".
This problem is typically caused by a portlet or multiple portlets pulling data on load rather than waiting for a filter to be set first by the user. 
To prevent this from occurring, as a best practice, all portlets should be set to NOT pull data on load, but should only pull data once a filter is set.