Fix: Error with loading AuthorizeNet payment plugin during debug - NopCommerce
by Harsha Bopuri on Saturday, 24 March 2012
Currently rated 0 by 0 people
If you are facing below problem
Method 'ValidatePaymentForm' in type 'Nop.Plugin.Payments.AuthorizeNet.Controllers.PaymentAuthorizeNetController' from assembly 'Nop.Plugin.Payments.AuthorizeNet, Version=188.8.131.52, Culture=neutral, PublicKeyToken=null' does not have an implementation.
most common reason is you might have MVC 4 installed on your machine and the quick and simple fix is to rename the system.web.mvc dll of MVC 4 so that it wont conflict with it.