TS2322: Type 'QueryClient' is not assignable...
Types have separate declarations of a private property 'queryCache'.
This means TypeScript sees two different versions of QueryClient because it's being resolved:
once in your main app’s node_modules
once again inside .wasp/build/web-app/node_modules
They’re not the same instance, even if they are the same version — and TypeScript cannot match private fields (queryCache).