My ipad has been setup with OneDrive, and I had initially configured the photos to automatically upload, so I have a backup of them, off my device. The upload worked great for the first upload, but the ongoing iPad photo upload to onedrive fails with no errors showing.
I finally found the fix
On the iPad
Go to Settings
Scroll down to OneDrive
Enable Background App Refresh
Mine was disabled
Over the next day or so, your iPad should begin uploading all of your photos again to OneDrive!
Success!!!
