GraphQL gql Syntax Error: Expected Name, found }

The accepted answer didn't solve my issue. Instead, it worked if you remove the initial curly brackets.

The query should look like this instead:

const query=gql`
  user(id: 5) {
    firstName
    lastName
  }
`

This error occurs mostly when there are unclosed curly braces or when some fields are not properly defined while calling the query.