Welcome to the Roon community. I will do my best to help you so you can listen to your music on the go.
When i look at the error message, UPnP is found but the automatic configuration hasn’t do the job. I think you need to make a manual port forwarding on the Eero Pro 6 router.
Open the Roon App and go to Settings —> Roon Arc. Write down the ip address and the port number shown there.
Take a look at below video and i hope you’re able to create the port forwarding.
a manual port still does not work but this @Ethan_Bloch issue is the closest I have come on the Roon community forum to finding a fix for my issue. @Ethan_Bloch what port or ports did you implement?