The issue with Lightning Node Connect (LNC) is likely due to the proxy server. The LNC proxy server is responsible for establishing a secure connection between the user's browser and the Lightning Network node. If the proxy server is down or not functioning properly, LNC will not work.

It's worth noting that LNC is still a relatively new technology and may experience occasional downtime or issues. It's possible that the issue is temporary and the proxy server will be back up soon. However, if the issue persists, it may be worth checking the LNC website or contacting the LNC team for more information.