Graphql Field doesn't exist on type

After skimming through the docs of Graphql I've started to implement it on a toy rails/reactJS project. The projects allows an user to sign in through devise then access a dummy /artist route that displays a list of artists. Everything seems to work fine until I try to consume api data with GraphQL from the react app to get artists and display them. On the server side, I have a graphql_controller.

[phare]

“Query attributes need to be in camelCase format, not under_score format. ”