Seems that your API call is being blocked, which causes the program to crash (for me): Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://api.ipify.org/?format=json. (Reason: CORS request did not succeed).

I now see a blank page for the link (https://karliezhao.github.io/venus_PandemicAndEconomy/) in both Chrome and Firefox