If you previously logged in using Facebook Single Sign-On and are now unable to, please follow these steps to continue using the Facebook login method:
- Go to Settings & Privacy > Settings on Facebook or use this link: https://www.facebook.com/settings/?tab=applications
- Scroll down in the left panel to Your activities and Permissions
- Select Apps and Websites
- Remove testerup from Facebook login
- After removing the app from Facebook settings, return to testerup and sign in again with Facebook Single Sign-On