Problem
You are receiving "Sorry, the seller's payment button settings are incorrect [Currency field is invalid]. If you are a buyer, please inform the seller" error message after clicking on a payment button.
Solution
If you are a customer, please tell your merchant to make the following changes. If you are the merchant, you will need to make the following changes in ALL your Buy Now buttons, HTML links and email links.
Add an 's' to the 'http' so that it shows as 'https' in the URL of the PayProcess.aspx page in your Buy Now buttons, HTML links and email links.
In order to avoid the error message when someone clicks on your Buy Now buttons.
Please make sure that the following line of your payment button contains a 's' in 'http://www.alertpay.com/PayProcess.aspx".
<form method="post" action="http://www.alertpay.com/PayProcess.aspx" >
Replace the line mentioned above with this one in your HTML code.
<form method="post" action="https://www.alertpay.com/PayProcess.aspx" >
***Notice the 's' in the URL and it now says 'https'***