Dear,

We did an export-import of Jira data from version 3.13 to Version 4.3.
Everything works fine exeptionally when we click on 'Work log' of an issue to see the history of the entered worked hours, we receive the error message "An unknown error occurred - actions == null. Please see logs for more details."
This only appears when there are hours nog logged by the current user. fe. User x logged hours on Issue 1 in Jira 3.13, when user x clicks on Work log, he can see the history, when user y clicks on worklog of Issue1, he receives the error message.

The same message appears when we click on 'All' but not on the other tabs like comments or Change History.

This is an importand issue for us because we planned the upgrade next saterday the 26th of November.

Regards,
Evelyne