Blank Checkout Page

Well... I'm panicing

I'm about to open this week and suddenly my checkout screen goes blank.

This is after I got my payment gateway installed and ready to go, ssl is in and was working great. I didn't do anything to it and now its gone!

So, I'm so happy I made backups...

So which files to I need to roll back to get this to work again?

https://www.satinwoods.ca/cart

Searching the Tutorials/FAQ area for "blank page" brings up this article: https://www.zen-cart.com/tutorials/index.php?article=82

Debug.... oh how I've missed you. Thank you for letting me know that I could debug and actually get some feed back on errors. This is going to save me down the road, thank you thank you thank you.

But.... I have no idea why its breaking.
The error has something to do with the storepickup Shipping options. When I turn it off

[02-Aug-2010 15:10:29] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/satinn5/public_html/cart/includes/languages/english/modules/shipping/storepickup.php:53) in /home/satinn5/public_html/cart/includes/functions/functions_general.php on line 44

storepickup.php;
Line 53 is at the end of the file

<?php

define('MODULE_SHIPPING_STOREPICKUP_TEXT_TITLE', 'Custom Shipping');

define('MODULE_SHIPPING_STOREPICKUP_TEXT_DESCRIPTION', 'We will contact you to confirm your shipping');

define('MODULE_SHIPPING_STOREPICKUP_TEXT_WAY', 'We will contact you to confirm your shipping');

?>

So what's going on?

Another handy FAQ, found by searching for "headers already sent": https://www.zen-cart.com/tutorials/index.php?article=87

Fixed by removing the blank spaces at the end of the file....
face palms
Unbelievable.

Thank you for your help! :clap: