TypeScript error blocking deployment on Vercel

[PresentMoment]

I've built a site off this template: sanity-template-nextjs-clean

When deploying to Vercel I get the following TypeError which causes the compiling to fail:

./sanity/components/IFramePreviewView.tsx:63:9
--
08:38:13.961 | Type error: Type 'SanityClient' is missing the following properties from type 'SanityClient': clientConfig, auth, isPromiseAPI

Opening the IFramePreviewView.tsx file VSCode displays the same error for the client param being passed to getPreviewSecret:

Type 'SanityClient' is missing the following properties from type 'SanityClient': clientConfig, auth, isPromiseAPIts(2739)
previewSecret.ts(14, 3): The expected type comes from property 'client' which is declared here on type '{ client: SanityClient; id: `${string}.${string}`; createIfNotExists?: true | (() => string); }'

This is blocking Production for us. Any help would be greatly appreciated. Thanks!