If the App has UNABLE_TO_VERIFY_LEAF_SIGNATURE error in the migration log file (C:\ProgramData\Qlik\Sense\Logs\AppMigration off the top of my head):
1. Stop Repository Service (this includes Proxy, Scheduler, Engine) and Service Dispatcher service
2. Remove “C:\ProgramData\Qlik\Sense\Repository\Exported Certificates\.Local Certificates” folder
3. Windows Start menu -> Run -> Write: mmc -> Press Ok
4. File -> Add/Remove Snap-in
5. Select Certificates -> Add 6. Select ”My User account” -> Finish
7. Press OK to close the Add/Remove Snap-In window
8. Expand the tree: Current User/Trusted Root Certification Authorities/Certificates
9. Remove Certificate that contain following properties: Issued To:-CA Issued By: -CA Friendly Name: -CA (The Hostname value can be different depending on what you entered as hostname when you installed Qlik Sense)
10. Start Repository, Proxy, Engine and Scheduler service
11. Wait until you can see files created inside “C:\ProgramData\Qlik\Sense\Repository\Exported Certificates\.Local Certificates” folder
12. Start Service Dispatcher service
13. Open up QMC -> Apps
14. Select one App and press the Migrate button (Note: You can multi-select and press Migrate. But do not migrate too many at once)
15. When Migration is succeeded verify that it is visible in Hub and can be opened
This issue has been logged as a bug and R&D is investigating. The above is the temporary solution that we in support have discovered to remedy the issue.
