A small bug may sometimes present itself and make the Upload or other buttons in HIP Mobile inoperable.
Quick Fix for Inoperable Buttons
Known Causes:
Using the Delete all button to delete Inspection Files.
Fix:
Step 1: Go to Settings in Mobile
Step 2: Near the bottom of the list click on Advanced Tools/Support
Step 3: Click Rebuild Inspection List
Go back and test the upload or any other inoperable button. They should be back to their working state. if not contact support for further troubleshooting.