After placing an order a prompt with a message "Sorry, but something went wrong. Please contact the seller.". This is the error
Undefined index: action in magento/module-authorizenet/Controller/Directpost/Payment/Place.php on line 109
when I look at the log.
The website is on a test mode. The website already has the patch and the new signature key. Does anyone have any idea on how to fix this? It would be a great help.