For Devices (ie. LG G4) that are using the latest Android 6.0 operating system, if the permissions are not set correctly for the LifeSite Vault app, direct upload via the camera or from another file application (ie. Google Drive) will not work. No informational or error message is displayed, it just doesn't work. Go into the Settings>App Info>Permissions for LifeSite Vault and make sure that the "storage" permission is turned on.
This URL explains the new permission settings for Android 6.0: Manage App Permissions: