4 - Login Facebook

Follow the steps to create a Facebook APP: https://developers.facebook.com/quickstarts/?platform=web

Create an application with the name you want

Write the captcha

Choose session start with Facebook

Choose Web

Fill in the form data

Fill in these data, they are important

Configure the options as they come in the image, in the field of "URI of valid OAuth redirection", paste the value that you have in the Admin in the section Setting-> Social login "Facebook Callback URL"