When a project gets rejected/placed on hold in the Portal you must review the Reviewer Notes in the Portal to find out what you need to change for a successful resubmission. To do that, follow these steps:
1 - Open the project in the Portal.
2 - Scroll down to the Project Timeline.
3 - Check off the box next to 'Show Archived Tasks' and click '+Expand All'.
4 - Scroll down to 'Workscope Review (Archived)'.
5 - View the Review Result.