Ring app does not find Echo4

I recently purchased two Ring floodlights and an Echo 4. I am planning on using the Echo 4 as the bridge to control the lights. I have enabled the Ring skill in the Alexa and connected my Ring account and my Amazon account. The Echo 4 is set up and working fine. However, the Ring app does not see the Echo 4 at all. It tells me I don’t have any compatible devices in my Amazon account. Has anyone encountered this? I read elsewhere that the addresses in the two accounts must match exactly, but I don’t appear to have control over them. The Echo adds 4 digits to the end of my zip, but the Ring app does not.