Authentication issue

[blipq]

Authentication exits with an error after logging email and password.

Exits with:

TypeError: Cannot use 'in' operator to search for 'error'

The issue is on or near line 155 of rest-client.js. Seems as if the "in" operator is referring to a string instead of an object? Would love help on this as I'm using the example extensivly to understand how to build.