The inferred type of 'trpc' cannot be named without a reference to '...'

  "references": [
    {
      "path": "../backend"
    }
  ],

{
  "references": [
    {
      "path": "./backend"
    },
    {
      "path": "./frontend"
    }
  ],
  "files": [],
  "include": [],
  "exclude": ["**/node_modules"]
}

The inferred type of 'trpc' cannot be named without a reference to '../../../backend/node_modules/.prisma/client'. This is likely not portable. A type annotation is necessary.ts(2742)
The inferred type of 'trpc' cannot be named without a reference to '../../../backend/node_modules/@types/express'. This is likely not portable. A type annotation is necessary.ts(2742)