Card validator doesn't work with port 8080. Works fine with port 80 :/


Our sandbox server uses port 8080 and validator tells “Server error, please try again” when trying to validate e.g.

Validating same card types and virtually same pages on the production server and port 80 works just fine (e.g. ), but well, I’d like to validate the card on the sandbox server first.

Is it really the unsupported port issue?
Has anybody had similar experience?