If you are testing a plugin for the first time, go through this checklist which has a list of common mistakes that people often make when testing (it will help you avoid those mistakes):
http://www.tipsandtricks-hq.com/forum/topic/plugin-testing-checklist-setup-preparation-for-testing
How to Enable Debug for PDF Stamper and PayPal Integration
If you are using a plain PayPal button with WP PDF stamper and having a post payment issue then it is a good idea to run a test transaction with debug enabled. This will let you see more details of what happened after you made the payment on PayPal.
1. In order to enable debug open the following file from the PDF stamper plugin.
wp-pdf-stamper/api/ipn_customization_config.php2. Change the following line:
$debug_enabled = false;to the following:
$debug_enabled = true;This will make it to where the plugin logs the activities in a log filed called "ipn_handle_debug.log". If you don't understand it then share the content of that file after a test transaction and we will be able to assist you.
Where to Find the Debug File
The "ipn_handle_debug.log" file will be created in the "wp-pdf-stamper/api/" folder. So look for the following file on your server:
.../wp-content/plugins/wp-pdf-stamper/api/ipn_handle_debug.log