PPM Works has identified a bug in the May 2017 CU. We have noticed after recent security updates that Project Center views were blank for select users. Not all users were impacted. The issue first appeared after the June 22nd Windows updates.
We had to submit a ticket to Microsoft to resolve. Microsoft identified a bug and reapplied the May 2017 CU. This resolved the issue and Project Center is now working for all users.
Hope this helps. Please contact us with questions.