The enhanced worklogdialog of minyaa introduces a cancel button into the worklog
This button has not the right context and ist pointing to the wrong url.
We have a tomcat war version of jira and the url schema should be something like
https://yourcompany.com/jira/browse/issue-123
But is
https://yourcompany.com/browse/issue-123

In the original dialog there is no such button.