This could possibly be a Unity bug, as the Asset store bug not updating the downloaded package. I deleted the cached asset and re-downloaded it and don't seem to have the same reported issues.
Ok, so no. Looks like the errors are not showing up as in a new solution the API validation settings are lower.
For 2019.1, the WWW class was marked as deprecated, in 2019.2 it is obsolete, hence won't work private WWW getAccessTokenRequest; (OculusPlatformSettingsEditor.cs)
The code needs cleaning up and updating in the asset.