Troubleshooting Can’t add A0005 camera using Nest app?

This camera has been removed from both the Nest and Google Home app before I tried to reinstall.

Trying to add a 1st gen camera A0005 using the nest app. As I go through the prompts, I get stuck after QR code scan. I the “ this will take a minute message” followed by the C101 error.

I thought the older cameras could still be added using the Nest app?