Transparent PNG Export for Web Doesn't work??

Hey everyone,

I am trying to create a transparent PNG file within CorelDraw 2018 using the Export for Web.

I want the Red color to be transparent and I have it selected and also have the Transparency check box checked.

As you can see in the image, the transparency isn't being displayed in the preview window and when I actually export the PNG file, the red color is still visible.

Am I doing something wrong?

This used to be a very simple thing to do and now it seems pretty convoluted or broken.

Any help will be greatly appreciated

https://drive.google.com/file/d/1krm7g_KWUz_svma-ihpxwrw4WvKLF31-/view?usp=sharing