After an upgrade from CC4 to latest CC5.2.5 the Authorize.net AIM payment gateway module stopped working on the site and in the backend. It is currently enabled.
In the site admin if you click to EDIT the Authorize.Net AIM module (in Payment Gateways) it loads a blank page.
During checkout on the site it also loads a blank page when hitting the payment gateway module.
This TOPIC may have been the solution but the links are now dead: '?do=embed' frameborder='0' data-embedContent>>