user cant create JIRA issue date event in Team calendar via JQL and saved filter when integrating with JIRA 8

Issue Summary

When the user has Confluence that integrates with JIRA 8, the user will not be able to add JIRA Event issue in the team calendar via JQL or saved filter. Team calendar will only provide the option to create JIRA event via the project.

Steps to Reproduce

1. Install JIRA 8
2. Create Application link with JIRA 8
3. Install Team Calendar
4. Add a JIRA issue date event
   For details, please refer to the following video
   Recording #52.mp4

Expected Results

The user is able to create the JIRA event via JQL or saved filter

Actual Results

The user is only able to create the event via the project

Workaround

Install the Jira iCalendar plugin version 1.5.0 and higher, https://marketplace.atlassian.com/apps/72413/jira-icalendar-plugin/version-history

Update (6/25)

With the closure of JRASERVER-68903 - iCalendar REST API returns 404 java.lang.NoClassDefFoundError, this problem is fixed if Jira is upgraded to version 8.2.0/8.1.1.