The payment method is not clickable by the buyer
When paying, some buyers cannot click the Payment by credit card button, the cursor does not transform into a hand like a clickable link, and if the buyer clicks on it nothing happens.
In this case, make sure that a third party analytics module is not involved.
For example, if you are using the Google Analytics Pro module, you will need to enable the option: Your customers use ad or analytics blockers by setting it to YES.