Hey there,
first of all, thanks for working on covid relief efforts - that is so important. Are you aware that we have a special covid plan? More here:
secondly, we completed some migration work today that relates to how Netlify URLs work.
Specifically, your app now ends in an .app domain instead of .com
More on that here:
Given that you are loading a map with mapbox, I am wondering if you need to update the URL for your site with that service for this to work. Did you provide them with a URL to get an API key or something like that?