You have configured one or more operations in the Issue Publisher for Jira configuration. Anyway there is no menu item "Publish Issue" in the "More" menu in the issue view available.
Before version 220.127.116.11: Make sure, you have selected a single issue template in the operation. Multi issue template are not supported for operations yet.
Since version 18.104.22.168: Make sure, you have the permission for at least one operation.
Since version 22.214.171.124: Make sure, the current issue matches the project and issue type filter of at least one operation and you have the permission for that operation.