Cannot set properties of undefined (setting 'step')

[prshantsharma]

Hi,
I'm getting an error in browser console when I start the TourService. Below is my code:

tourSteps: IStepOption[] = [ { anchorId: 'welcome', content: 'Lorem ipsum dolor.', title: 'Welcome', }, ];

In ngOnInit, I put this below line of code:
this.tourService.initialize(this.tourSteps);

I created a function to start the TourService as below:
startTour() { this.tourService.start(); }

In my HTML, I put this below code:
<div tourAnchor="welcome"></div>

Also, I pasted <tour-step-template></tour-step-template> in app.component.html as you suggested already in the documentation.

What I'm doing wrong here. Please assist.