I have managed to successfully configure authorize.net with latest SHA on Magento 2.2.5 and its appearing as payment method but when i enter credit card no. it gives error saying "Please enter a valid credit card type number"
Authorize.net : sandbox account
CC details: Tried all test CC's given
Seems like validator.js is throwing this error but not sure why it is not accepting. Even tried applying luma theme in order to check theme conflicts.
Any help much appreciated,