Not a valid origin for the client: https://example.com…egister this origin for your project's client ID

my web application use the google sign in ,and I make it work by add the https://wwww.example.com to the Authorised JavaScript origins,now I need to add the root domain https://example.com to the Origins,but the https://example.com does not take effect,what happen to the root domain,does the root domain can not use to googe sign in?only the sub-domain take effect?

Not a valid origin for the client: https://example.com…egister this origin for your project's client ID.

does anyone have the same problem,looking forward to your reply,thank so much