Orders/Settings pages PHP error

As stated in your error that you need more memory. It could be caused by many things so it is hard to know what. But to temporarily fix this issue, just increase your PHP memory.

I already increased it to 128MB, which is more than enough. I migrated this site from WP-Engine to my Linode server, and it works fine on the WP-Engine hosting, but not my Linode server. I have 14 other sites (5 WooCommerce) that are working fine on my Linode with 64MB of memory.

Do you have the exact same set of plugins and theme as the other sites?

Yes, and I’ve been deactivating them one by one, and none of them appear to be the culprit.

Well instead of deactivating the plugins one by one, have you tried just turning all of them off except WooCommerce and see if that memory issue goes away?

Yep, I did it one by one, and after deactivating Gravity Forms, the issue went away. I found that Gravity Forms and Contact Form 7 are both installed on this site, but only Gravity Forms was being used.

Deleted Contact Form 7, and once it was deleted, I saw the client had the Orders page set to show 159 orders per page, or so, which was probably timing out MySQL/PHP. I set that to 50, and then all was well again.

Thanks for the help!!