When attempting to access projects via the Modern / New User Experience (UX) the following error appears:
API-1005 : Attribute(s) 'reportDate' specified in query parameters are not supported
This happens when you click on every link on the New User Interface main page,
The PMO Accelerator is not installed
All Clarity versions from 15.1 and higher
Install the PMO Accelerator.
The instructions are in the following link: Install the PMO Accelerator Add-In and PMO Sample Data
If the above doesn't help, see also: API errors - known causes for Clarity