My OpenCart store is currently unable to complete orders whenever customers choose Authorize.Net at checkout. The payment window opens and the customer submits their card details, but the process never reaches the final “order confirmed” stage in OpenCart, so no order is recorded in the back-office and no confirmation email is sent. Other gateways behave normally, so the problem appears isolated to the Authorize.Net integration. I need someone who knows OpenCart’s checkout workflow inside out and is comfortable digging into the Authorize.Net extension, transaction logs, and any JavaScript or server-side conflicts that might be interrupting the callback. Your goal is simple: identify the failure point, apply the fix, and prove that an order can move cleanly from payment to confirmation every time. Deliverables: • A patched or replaced Authorize.Net module (or core checkout files) with clear documentation of the changes • Evidence of at least two successful test transactions showing order creation in the admin panel and confirmation emails reaching the customer • A brief summary of root cause and steps taken so I can maintain the fix during future upgrades If you’ve solved similar Authorize.Net or OpenCart checkout issues before, please outline that experience when you respond. I’m ready to give you access to a staging copy of the site as soon as we agree on the approach.