contributor-graph not working, getting 'Request Error' message on the website

[yzeng25]

1. click one of these three links here https://github.com/api7/contributor-graph?tab=readme-ov-file#demo
   

2. redirect to the site and has the following issue
   

I see plenty projects are using this in #47 , and they might face the same 'Request Error'.

Is this project still under maintainance?