I use an ethernet USB-C Adapter to get internet connection. Everything is working like expected, but not App Longe (v2.8.0). I just get “Can’t connect! Please check your internet connection and try again”.
I tried also to disable “Only on un-metered networks”, but also without luck.
Does probably not help, but I have the same issue with old older and current App Lounge version with USB2Ethernet Adapter. But, don’t know the answer, on how to fix this.