[jasonjaques]

@Vacman Hey I did manage to replicate (i dont know how) your fault through one of my various adventures of re-installations of my dev store. I managed to get it going again by selecting down the bottom of Payment Methods Use this payment method for orders with zero total cost. and choosing a different option and hit SET. Also changed the XPayments Position to 0 (Zero) and disabled all other payment methods. and hit APPLY. I dont know which fixed it but then the IFRAME loaded correctly in the OPC (not just saying Xpayments: Method and loading the payment window in the OPC, and and the problem went away. Worth a try, i wasnt expecting to run into the problem, but did so though i would give you and update for something else to try. Sorry writting a bit random, in a hurry.

Jase
Xcart Dev 4.55