Issue in React application - TypeError Cannot read properties of undefined (reading DemoGraph)

[stratigon]

Hi!
Thank you for this repo, it's helped a lot!
GraphQL part work as expected.

Have an issue with React app - you can see below:
I

I'm not an expert in React, but the steps were reproduced as in the README file.

[songrenchu]

Hi @stratigon,

The error looks like that Apollo is not getting valid GraphQL response from the TigerGraph GraphQL service.
Could you share a screenshot of the GraphQL part in your browser including the URL bar, and the config.json file in the React app?
From the 2nd screenshot you shared, the react app is running on 10.199.199.127. Which IP is the TigerGraph GraphQL service running at? Does the app machine 10.199.199.127 have access to that machine? If they are not on the same machine, is CORS configured?
If you are using Chrome, you can also open View -> Developer -> JavaScript console on the web app page, refresh the page, and see what error message is logged there. Please paste the error message here and we can further investigate

Best,
Renchu