[5.x]: If an error occurs during 'send email' via the orders page, there is no feedback to the admin user

[jlawrence-yellostudio]

What happened?

Description

If an error occurs during mail transport, there is no error indicated to the admin user, just an infinite spinner. The error does get logged in the javascript console.

Steps to reproduce

1. Provide invalid mail settings in email settings, e.g. SMTP transport with invalid host, or some custom transport with invalid API key.
2. Try to send a commerce email from the order detail page.

Expected behavior

1. An in page notification telling the admin an error has occurred.

Actual behavior

1. Infinite spinner and javascript console error.

Craft CMS version

5.4.4

Craft Commerce version

5.1.1

PHP version

8.3.9

Operating system and version

Darwin 22.6.0

Database type and version

MySQL 8.3.0

Image driver and version

GD 8.3.9

Installed plugins and versions

[linear]

PT-2172 [5.x]: If an error occurs during 'send email' via the orders page, there is no feedback to the admin user