\uD83E\uDD14 Problem
Cannot load Email This Issue application admin interface.
\uD83C\uDF31 Solution
To use the Email This Issue application on the Cloud, you will need to revert to using an atlassian.com domain for your Cloud instance.
Atlassian support will be able to help you make this change.
Custom Jira domains are currently not supported by Emai This Issue on the Cloud.