Uncaught TypeError: this.firePropertiesChanged is not a function

Dear all,

I'm new to SAP Design Studio.

Currently I'm facing an issue when I'm trying to call "this.firePropertiesChanged" in afterUpdate function as shown below highlighted in red box:

But I get the error message in browser's console as shown below:

What I'm trying to do with the firePropertiesChanged is to update my component's properties - HTMLString with the value retrieved from SAP ECC.

Would be very appreciated if anyone can advise on why I get such error message for the firePropertiesChanged in afterUpdate function call.

Thanks.

Best regards,

LY