I am running dnn 5.5.1 with sc ver 3.93

When I try and checkout (cart is set to use MyGate Enterprise) I am getting the following error after I submit the credit card details:

A critical error has occurred.
Could not load type 'Secure.Item3DSecure' from assembly 'App_WebReferences, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'.

When I go to look at settings, my settings are correct (I have merchantID, ApplicationID and GatewayID set correctly).

I am sure there used to be an option to select MyGate Enterprise with or without 3D enabled?

Pls come back on this urgently as I cannot process any orders via the cart now (and was working fine in the past).

You are also missing the following from your documentation re the MyGate Enterprise gatewayID options : 24 - Standard Bank