When first creating an email, the option to send the email to "Users with a role" results in an error message.
Go to /admin/commerce/config/emails and click Add email. Enter the fields, and under the option "Send this email to", select "Users with a role", and choose any role. Click Save. An error message is shown saying that "Email field is required."
Dont do validation on the Email field when the "users with a role" is selected.
When creating an email, set "Send this email to" to "Specific email address", and Enter any value as the email. Save the email. Then select Edit, and change "Send this email to" to "Users with a role". This time, when you save, no error is generated.
Active
1.6
User interface
The issue was caused by the required "To" field that triggered the server-side validation after the conditional fields failed to validate the "To" field properly. The attached patch removes the "required" attribute and implements a custom validation of the entered "To" address.