Add Wireguard Client Manual Input not working

Here is the other Picutre

Which model are you using? It is a bug, we had fixed it, you should try the latest testing firmware.

I have an gl.inet m300 lite with firmware 3.019 and manual wireguard config work ok for me. The only think i need to enable dns over tls cloudfare option for internet access but all is ok and the speed is very nice.
Regards

v3.019 has fixed this issue, it only occurs in testing firmware, but we had fixed it. Upgrading the firmware would be help.