Typescript error

[IAmAMFTRex]

On building the final version of this example, a Type error is thrown:

./node_modules/.prisma\client\index.d.ts:11:33
Type error: Type expected.

9 | type UnwrapPromise<P extends any> = P extends Promise<infer R> ? R : P

10 | type UnwrapTuple<Tuple extends readonly unknown[]> = {

11 | [K in keyof Tuple]: K extends ${number} ? Tuple[K] extends PrismaPromise ? X : UnwrapPromise<Tuple[K]> : UnwrapPromise<Tuple[K]>
| ^
12 | };
13 |
14 |

error Command failed with exit code 1.

I was able to determine the version of TypeScript was invalid - package.json has:

     "devDependencies": {
    "@types/next-auth": "3.1.14",
    "@types/node": "14.14.6",
    "@types/react": "16.9.56",
    "prisma": "2.25.0",
    "typescript": **"4.0.5"**
  }

It should be:

     "devDependencies": {
    "@types/next-auth": "3.1.14",
    "@types/node": "14.14.6",
    "@types/react": "16.9.56",
    "prisma": "2.25.0",
    "typescript": **"^4.1.0"**
  }