Hi
I’ve hardwired my ring doorbell but cannot complete the chime section of the setup (see screenshots)
However by going to notification settings I’ve setup successfully that when the doorbell is pressed the installed doorbell rings fine.
I just cannot complete setup. And the red ! Is bugging me! As it all works fine!
Second screenshot
Hi @Rob2005. I’d recommend resetting your Doorbell and walking through a fresh setup in the Ring App to see if that will clear up this message you’re seeing. You can reset the Doorbell by holding down the setup button for at least 20 seconds. After that’s done, take it through a new setup in the Ring App by following the steps under Set Up a Device. Let me know if that does the trick for you. 
I had this problem. Go into your doorbell and then into it’s settings (the gear, top right). Scroll down and press “Device Settings”. Then press “In-home Chime Settings”. I had to do a manual setup. Mine worked with “Digital 1” but yours may be different. After getting it to work, the Red message went away.