I can not get Sign in with Google to work in my app.
To make sure something in my app is not interfering with that part, I have made a new project, just to see if Studio can actually make Sign in with Google work (and use Firebase Authentication). Note, I have made that working in over 10 previous projects. So I know it is possible and used to work quite well during the last 2 months.
Now my new super simple project has just a home page, login page and a page you land when you are logged in. I have enabled billing, added all the project URLs to GCP Console, Firebase, etc. I simply can not get Sign in with Google to work on the last 2 projects. Did something change or am I still missing something (getting old)?
Just a note: The Sign in with Google actaully works when you are in Prototyper. But on a preview URL or site published to Hosting, I get this error (as per image).