We done some internal testing and fired up a local development site to see if we could replicate the issue:
As you can see i am able to edit a product with Elementor ok.
So i am not sure what is happening.
I had another look at your site, and checked the developers console when Elementor fails to load the page, and it has two errors:
Might be useful to pass this onto Elementor and ask them to take a look.
Something else you may want to try is to edit a new draft product with Elementor. To eliminate there being a specific problem on that product.