When you click on the "Add to calendar" link in the Actions menu for an event, the error message "An unexpected error has occurred" appears. This error continues to appear after editing and updating the event.
This article provides more information about this issue.
Jive Hosted/On-Premise versions prior to 126.96.36.199.
This issue was identified as a defect and resolved in Jive version 188.8.131.52. In order to resolve this problem, please upgrade your Jive instance to the latest version.