Here's the values and steps for setting up that trigger.
Here's the target URL for her to copy and paste
https://acxss.app/PHPAPI/webhooks/sage/sage.php
After filling these out, she then needs to click on the little plus icon where it says "Select a document template to use to generate an HTTP POST call."
That will lead to this:
She needs to click on Choose File to upload the attached file from the email.
After she adds the template name, the screen should look like this:
Then save