do you know whay its happend?
vvvv
Could you have a look at the sign-in options in the settings of your project: is the checkbox for sign-in with Google checked?
Check your privacy settings. This may be related to your other post where you have older privacy settings. I think older Page projects only allowed private sign in or completely public. There was no hybrid Optional sign in option.
The problem here is that you may not have that email in your user table, which needs an existing list of whitelisted emails that can have access to the page.
Like I mentioned in the other thread, Iām not sure if this is a bug. It might just be part of how older pages work. You may need to create a new team folder and migrate the page to that new team.