Facebook API's fb:registration returning “Invalid 'client_id'” when not connected to Facebook
问题 I'm trying to use Facebook's registration tool for my website. I would like to allow Facebook users to login seamlessly to my website, but also non-Facebook users to create an account through that unified UI. I'm using the <fb:registration> tag for that purpose. If I'm already connected to Facebook when arriving to the page, everything works as expected (the form is prefilled with information from my Facebook account). But if I'm not connected to Facebook, the following error is displayed: