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I am using Ninja Form and I've triple-checked the API and Transaction Key and the live mode both on the website and on Authorize.net. Sandbox works perfectly. When I switch to Live, I just get a "The transaction was unsuccessful" message.

I am using Caldera Forms in WordPress with the Authorize.net Addon in Sandbox mode. Everything seems set, but I keep getting "Error connecting to AuthorizeNet" when trying to use the form. I've read other discussions on this forum with the same topic...