Keypad and contact sensors can not connect to the network

I purchased the 1st gen ring security kit from Costco last year and tried to set it up recently. However, only the base station works fine (the app shows it is online but I wonder if it actually works correctly). Both keypad and contact sensors can not be set correctly. The error message on Ring app is "waiting for connecting to network". I've tried all methods provided by Ring Help Center such as "plugin/unplugin power", "factory reset", "remove z-wave device". I wonder if there are other methods I can try to set the keypad and contact sensors.