In fact :
With plugin 1.2.3:
After having filled in all the fields and the codes of the bank card, I can validate the order, the Order button works and the order is placed.
With the plugin 1.2.5:
After having filled in all the fields and the codes of the bank card, I cannot validate the order, the Order button is inoperative. Unable to validate the order.
I tested by disabling the other plugins, I checked with the developer tools of my browser, there is no error.