Can I use WP-Engine as a host when using Cart66?
It is no longer advisable to use WP-Engine as a host for Cart66 Cloud. Most of the issues we see are in the Cart66 Membership features.
If you must, there are a few things you can try at your own risk. WP-Engine tends to cache the entire server which can sometimes effect Cart66. Most notably, there is a Cart66 cookie that does not get set, which can lead to strange issues like cart contents/quantities not updating or the membership restrictions not always working in some cases.
The solution we have arrived at is to please contact WP-Engine support and request they exclude the "ccm_token” cookie from caching and disable caching completely for the domain as a last resort.