Unable to test Cloudflare Page Function: [wrangler:err] Error: No response!

export function onRequestGet() {
  return Response.json('test', { status: 200 });
}

# Top-level configuration
name = "comments"
main = "./functions/api/comments.ts"
send_metrics = false
compatibility_date = "2022-07-12"
node_compat = true
workers_dev = false