TypeScript Text Error

[VBConst68]

I'm new to HTML5 game development and am using Phaser.  I decided to convert the tutorial to TypeScript as practice, but am getting an error.

 

The offending line: this.scoreText = this.game.add.text(16, 16, 'Score: 0', { fontSize: '32px', fill: '#000' });

I commented out the line and the error went away. 

 

The error: JavaScript runtime error: Unable to get property ''x' of undefined or null reference

The error is thrown on Phaser.js line 24853, rect is undefined. 

 

Can anyone see what I'm doing wrong?