Starting yesterday-ish, getting CORS errors on pages with LiveChat enabled

We are getting “Cross-Origin” errors in the console on pages where LiveChat is enabled, and the chat is not appearing. This was working perhaps as recently as yesterday (6/2/22).

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://nifbgeneva.il.3cx.us:5001/MyPhone/config/callus. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing). Status code: 404.

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://nifbgeneva.il.3cx.us:5001/MyPhone/config/callus. (Reason: CORS request did not succeed). Status code: (null).

TypeError: NetworkError when attempting to fetch resource. callus.js:48:297837

The page I need help with: [log in to see the link]