Log as an admin into your Jira instance. In case you have already installedWorklog Historyplugin, please uninstall it. Otherwise, you will find two sets of information for each issue, which may be misleading. Check thispageto find out how to uninstall plugin.
Click the admin drop-down and chooseAdd-ons.
OnFind new add-onsscreen, locateWorklog HistoryPROvia search. Appropriate plug-in version appears in search results.