Github sync with Utopian.io does not work

Expected Result-

Github should sync with Utopian.io while pressing the "Sync with GitHub" button Utpian.io

Actual Result-

Github sync with Utopian.io does not work. After pressing the "Sync with GitHub" button , a blank page shows and the url shows the call back code of GitHub integration with Utopian.io

How to Reproduce-

1. Go to Utopian.io
2. Then login in with your steemit account
3. Then press the "Sync with GitHub" button to sync with GitHub

Browser and OS-

Mozilla Firefox Developer Edition 60.0b14(64 Bit); Windows 10 (64 Bit)

Recording of the Bug-

After pressing the "Sync with GitHub" button the blank page was found can be seen from the following image-

##Because it is impossible to post in utopian.io without GitHub integration, that is why I had to post this bug in steemit.