Problems editing the product page

Hi, recently I installed & activated YITH WooCommerce Catalog Mode in my wordpress. At first, I used it to upload my products & create my product page, and it has no problem. But after few days, when I clicked onto the page to edit again, the edit page couldn’t load out, and it said this : “There has been a critical error on this website. Please check your site admin email inbox for instructions.” Other pages are all fine, just this product page has problem. This page still can be previewed, but it can’t be edited. I actually contacted wordpress but they said they can’t figure out what’s the problem, so I am here to see if you could help me. Thank you!

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