Before you start
Make sure your 2Checkout account is fully activated and you are on the 2Monetize plan.
Check out this article for more info
Check out this article for more info
Required configurations for 2Checkout payment gateway
You need to set your 2Checkout IPN settings correctly for the 2Checkout payment gateway.
You can configure your IPN settings from this link: https://secure.2checkout.com/cpanel/ipn_settings.php
From there, you need to add a webhook URL. The URL should be like this: https://yourwebsite.com/webhooks/twocheckout
Note
2Checkout doesn't provide trials.