Quote Originally Posted by newtozc32 View Post
... I get a 500 server error. Where can I find error logs to see which file is not loading correctly?
In the Web Server error logs on your hosting provider. "500 server error" is just that, a SERVER error.

Quote Originally Posted by newtozc32 View Post
I have a hunch it has something to do with new_order.php.
I have a hunch something was not installed correctly... Possibly a file was misplaced, a merge was not successful, or the installer did not complete...

First things to check: What error can be found in the server log in regards to the "500 server error"? Are there any debug logs in the /logs/ or /cache/ folder on your server?

Second, what do you see if you perform the following:
  1. Login to your Zen Cart admin.
  2. Upload "new_files_15x/admin" to your admin folder on your web server.
  3. Click on "Admin Home" in your Zen Cart admin?