can not use the protractor's function to select elements

[ww18]

can not use the protractor's element key to select elements
I change the world file, change the this.by = webdriver.By; when i use sut.by.buttonText(), It can not find the element
TypeError: undefined is not a function
at Support.findByText (/Users/phoebe/projects/protractor-cucumber-master/example/features/step_definitions/support.js:17:34)
at World.

[JasonSmiley208]

I've noticed lots of the protractor elements are not working as well.

For example, protractor.ExpectedConditons don't work (seems like nothing is initialized properly)