BPM UI5 Authorization error

Hi Folks,

Just deployed my first BPM with UI5 screens to start the BPM process. However when I try to access the UI5 startscreen it throws the following 403 Forbidden error and below is the error in the security log. The user has "Administrator" access in the system. Is there any other setting or role required to start the UI5 screen.

Permission check failed | ACCESS.ERROR | USER.PRIVATE_DATASOURCE.un:XXXXX | | Application=[vendor00.com/po_enthanced_00~bl~ear*vendor00.com~po_enhanced_00~ui~web], Message=[The user does not have rights to access relative URL '/StartProcess_PO_00.html' with HTTP method 'GET']

Thanks,

Bhargav.