---- run.graphql ----
query RunInput {

  cart {
    lines {
      id
    }
  }

  appInstallation(id: "gid://shopify/AppInstallation/73424761***") {
    metafield(namespace: "attributes9", key: "attributes9") {
      value
    }
  }

}

I’m attempting to access app-owned metafields within a Shopify extension function, but I’m encountering the following error:

Error 0: 
Cannot query field "appInstallation" on type "Input".

I could thankful advance if any insight