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I'm sharing a solution as another discussion is locked (Sense Server Installation).
When installing QlikSense server, followed the Plan and Deploy QlikSense (April 2018) to a tee and still ran into an issue... my install kept failing with the following error:
"One or more of your persistence file share folders has not been configured properly"
After searching multiple forums, I found that I had to log out of the server and log back in again to enable the QlikShare folder Sharing/Security settings to be allocated to my account.