If the Nest app says the thermostat is linked to another account, then I
am sure you might need to remove it from the old account first. If you
do not have access to that account, try doing a factory reset instead of
just restarting. You can find thi...
It could be a Nest Aware subscription renewal, especially if you had a
yearly plan. Check your Google account order history to see if a device
was purchased. If it seems wrong, contact Google Support to sort it out.
I would suggest trying 3 things. One is Re-select Your Album, the other
is Clear Cache & Data, and the last is Check Google Photos Settings –
Make sure your album isn’t private or restricted in Google Photos.