Wireguard VPN connection issue

[Benco]

I'm looking to understand the following phenomenon using a Flint 2 as Wireguard server and Slate AX as a client to connect to my home internet remotely. I noticed losing the internet connection this morning using Slate AX (the client). It seems that my client configuration can't reach the Wireguard server (see on the below screenshot).

In the meantime, I tried to connect to the Wireguard server using the Wireguard application on my desktop. Strangely, it seems that the connection is still active between the client and the server configurations (see on the below screenshot), but there's still no internet connection. I can't access anything on the internet.

In the past six weeks, the VPN connection was stable. I haven't changed anything before this happened. Have you ever experienced something like this?
Thanks!

[admon]

WireGuard client on Mac or Windows does not know whether a connection is successful or not. This "connected" indicator isn't a real test unfortunately.

So you need to check the server remotely - best by using GoodCloud.

[Benco]

Thank you, @admon !

[alzhao]

You need to check the "Data Received" data on the application.

In your image, there is only "Data sent", meaning that it does not connect.