Plugin hanging up

This site is in “coming soon” mode so not yet accessible without logging into WordPress.

I’m using WooCommerce plugin and am adding a variable product. When I add more than just a few variations, it causes the site to freeze. I’ve actually had to delete and recreate the entire site several times. I checked, and there are no server or memory issues, nor is there any error message. The spinning wheel just continues to spin when on the front end you make selections (before you can click “Add to Cart”).

Are there any requirements or causes for it to just hang at a spinning wheel?

The page I need help with: [log in to see the link]