Module not found: Error: Must provide Source

[jonathangaldino]

This will occur if you have a monorepo setup and, somehow, you also got two version of graphql installed.
Since the release of v15, instrospectionQuery is deprecated. There is a new function called getIntrospectionQuey.

Somehow, this lib was using the most recent version of graphql available in node_modules and was trowing Module not found: Error: Must provide Source.

For me, to fix this matter I had to downgrade all graphql versions to v14. In my setup, I had a package called server and client that was using graphl v15, since graphql is a dependency of this lib, I ended up with two versions of it.