Hello Tuan. It's been seven months since we talked because everything has been running so smoothly! Now though we may have an issue which is not related to any bug in your app. We use your Authorize SIM payment plugin. Also have Hikashop set up exactly the same way. The Hika cart broke because Authorize went to a new handshake protocol.
It was really easy to deal because Hikashop already had an updated payment plugin ready to install. I got a new Signature Key, installed it, and boom we were back online.
This is probably something you need to do and probably have already done, because you are always on top of things. Although the Hikaship plugin installs automatically when we update the whole app, I think you do it differently, and we would need to separately install the updated plugin.
We also subscribe to your Payment Form, which also uses an Authorize SIM plugin. So that will need to be addressed too.
Overall we've been thrilled with Membership Pro, such an improvement over the old OSE Membership.
Please advise at your convenience.
-Jim Gribble, on behalf of Education Law Association, educationlaw.org.