...
- Download Issue Creator for Stash on the Atlassian Marketplace (Details Tab, click the download button).
- Click the admin drop-down on your Stash instance and choose Add-ons.
- Click Manage Add-ons...
- Click the Upload add-on link at the top right side of the page.
- Enter the location of the JAR file you downloaded.
- Click Upload.
- You're done!
Configuration
Issue Creator for Stash needs an application link between Stash and JIRA in order to communicate between these two applications.