Network Error while logged in into Admin GUI

Dear All,

I have installed kong gateway opensource on Docker and after that i logged in into admin GUI portal ,and in the kong.conf file i configure the admin_listen to my current public IP and the port=8002 and adjust the Dev-portal= on but after browsing my public IP with the port 8002, i see a red banner network error in the main page of admin GUI portal and i can’t use dev portal Appreciate any help!