Mockup Feature does not work and causes illustrator to freeze

I dont know what the devs have done because it used to be really easy to use.

Now if I have an image and a vector shape, illustrator has a really hard time creating a mock up using those two assets. Regardless whether I select the shape first or the image.

I have a poster design (both in svg and jpeg), and an image of a poster stand (jpeg).
I wanted to put the design onto the poster stand. simple. nothing more nothing less.

But for whatever reason, illustrator never selects the poster design.
The result is a mashed up white vector used from the stand image.

After trying so many times it began too freeze and I had to force quit the application.

I have attached 3 screenshots.
A screen shot of the design and stand.
A screen shot of the design and stand with a vector shape used for the mockup.
A screen shot of the result.