In order to log in via Facebook, you have to accept the email filed.
Please follow the below steps:
- Remove Slooply App from your Facebook: (Go to Settings & privacy > Apps and websites)
- Go to Slooply and click Sign up / Log in and click connect via Facebook
- You will forward to a Facebook page, and click link: "Edit this"
- Enable email address field and click blue button "Continue as ..."
- You will be redirected to slooply.com as logged in user.