Bad url when a user’s registration

Hi,
When a user register to my website, the redirect url is bad like that :
https://www.domain.com/register/www.domain.com/inscription-member-page/
I’ve searched, but I don’t know why…

For your information, I’ve change my default url to domain.com to https://www.domain.com recently with sql request.
Maybe my sql request was bad, but I don’t know where I can search on my db.

Thanks by advance.
Best Regards