Add the Create Note Page

Just replying here in case, have you added it to your Identity Pool IAM?

    {
      "Effect": "Allow",
      "Action": [
        "execute-api:Invoke"
      ],
      "Resource": [
        "arn:aws:execute-api:YOUR_API_GATEWAY_REGION:*:YOUR_API_GATEWAY_ID/*/*/*"
      ]
    }