I have been trying to set up SmithCart using the First Data Global Gateways. We were using the Link Point API and getting A critical error has occurred. Object reference not set to an instance of an object.
We spoke with SmithCart a few days ago and were told to try the more current First Data Web Service. Our client signed up for that and we still get the same error with that configuration. We have used a test authroize.net account and the orders go through, but our client paid for this service with First data and this cart seems to be our only option that is supposed to work with it, and we would like any suggestions to resolve this quickly.
We are on DNN version 5.04.04. We are on a full trust web server and have ensured that we have opened ports and tried removing the firewall.