ERR Error: Error during instantiation of BasicProvider

[productdevbook]

ERR Error: Error during instantiation of BasicProvider: Cannot read properties of undefined (reading 'hello') - in Module "basic" (Operation Scope)

Bug Repo: https://github.com/productdevbook/bug-graphql

v18.12.1

1. pnpm install
2. pnpm dev
3. open http://localhost:4000/graphql
4. Run query

query {
  contextKeys
}

5. Terminal see ERR Error: Error during instantiation of BasicProvider: Cannot read properties of undefined (reading 'hello') - in Module "basic" (Operation Scope)