Yup, I found this too. If you have any automation that include a
personalized automation, don't delete it. The new Gemini took over for
new ones and will not allow any personalization. Start a new automation
and you will see what I mean.
Considering that the newer battery operated cameras from Nest have never
streamed to any device makes me suspect they are not going to worry
about this issue. Personally, I have purchased a Roku camera, only 1 to
start, and testing how that works. So...