Search using products in cart within user carts error

I’ve a few saved searches created via the Product listing page.

When I want to search for the products using the saved searches at the “User Carts” page (by selecting the saved searches under the Advanced Search options-> Products in cart option), it will always lead to a 500 Internal Server error page.

I wonder if anyone else is having the same problem?

I have 450 saved carts. I’ve tried using a Saved Search that search for 25 products to 1000 products, all which failed.