Notice! This is only related to 32 Lives. If your Auto Tune is 64 bit then you should upgrade your Antares product.
Antares GUI is empty,
It seems since macOS 10.12 High Sierra some code has changed. This cause older plug-ins to not show UI properly.
1. Make sure Auto-Tune is showing up under 32 Lives. If it does not show up it means it is 64-bit!
2. If it's not already show Wrapped (instead of 32-bit only), wrap it.
3. Make sure you're using 32 Lives 2.0.3 or greater.
(version number can be found on the splash screen and in any About screen).
4. If you need to update 32 Lives go to your user area.