We recently migrated from an older development environment to a new server where we plan to go in to production. The code has not changed but we are now experiencing issues with Accept.js. We have confirmed that we are connecting to the sandbox link and using sandbox credentials.
When the user enters their card info the form appears to submit but then nothing happens. It just sits at that point with the spinning wheel that says loading. The wheel stops after about 5-10 seconds but the iFrame form never closes.
In the Network Panel of Developer Tools in the browser we see where Accept.js does a GET, an OPTIONS, and a POST as shown in the image. At this point the Accept.js code hangs and we don't really know why.
