Getting error on ./Pods/Apollo/apollo-ios-cli generate

Getting error on ./Pods/Apollo/apollo-ios-cli generate

Following is the error:
“/Users//Documents/GraphQLDemo2/GraphQLDemo2/schema.graphql:1:error:The "" definition is not executable.”

I am following steps mentioned in Setup and run code generation

We’re working on emitting better error messages from the codegen cli, but in the mean time, this sounds like you may have an operation definition that doesn’t have a name?