{ "error" : failed to create session } is getting displayed when try to login in utopian.io

Bug description : { "error" : failed to create session } error gets displayed when try to login to the utopian.io.

Sometime by refreshing the page we are able to see the home screen of the app.[ This behavior is random ]

I was able to reproduce bug by clearing cache and cookies.

Expected behavior

User should be able to login to the app successfully without getting any error when provided valid login details .

Actual behavior

{ "error" : failed to create session } is getting displayed when click on the login button.

How to reproduce in Firefox

1. Navigate to the join.utopian.io page.
2. Clicked on login button.
3. Provide valid login details and click on Login button.
4. Observe the blank page with { "error" : failed to create session } error.

How to reproduce in Chrome

1. Navigate to the join.utopian.io page.
2. Clicked on login button.
3. Login with the valid details in app
4. After successful login click on the logout button and log out form the app.
5. Click again on the login button.
6. Observe the blank page with { "error" : failed to create session } error.
7. Refresh the page using browser refresh button or by pressing F5
8. Observe that home screen is getting displayed. [This behavior is random as sometimes still error gets displayed]

• Browser:
  Chrome V. 63.0.3239.132 (64-bit)
  Firefox V. 57.0.4 (64-bit)

• Operating system: Windows 8 (64-bit)

Error screenshot