I have 2 WooCommerce sites running on PHP 7.2 so that is not your problem. Have you changed your theme to 2017 and then enabled WC? What theme are you using? What plugins are you using? You said you were moving to a more powerful VPS but do you have enough memory allocated to your site? Have you read the server requirements for WC 3.5.x?
Please don’t take offense at any of my questions but you may be so close to this issue that you are overlooking something.
What about your products? How many do you have? Are they variable products?
Just tried to switch the theme to 2017 and still I face the problem. Remember the problem it’s in the backend and not in the front end, which is working fine.
I’m using Flatsome, updated to the last version.
Not many, I’m just using Woocommerce, jetpack, Contact form 7, Yoast, Really simple SSL. Of course I’ve already tried to disable every plugin and the only one that trigger this blank page is Woocommerce.
Yes, I’ve read the requirements and everything it’s okay from my side.
I have almost 50 products and are not variable products.
Had similar issues after updating the server to PHP 7.2 – in my case I fixed it by increasing the memory limit:
https://docs.woocommerce.com/document/increasing-the-wordpress-memory-limit/
I used the first method – a new line in the wp-config.php file.
Just kept increasing the value until it worked.
Already tried this, doesn’t work