internal server error after update WooCommerce 4.0

Hi,

I updated Woocommerce to 4 and wordpress to 5.4 last week and now occasionally get internal server error messages when trying to add products or pages. But not continually. Hosting company upped the memory limit to 750MB and time out to 500 seconds, but to no avail. And the server error logs don’t show any problems. Any thoughts what this could be?

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