Confluence 'Create JIRA Report - Change log' doesn't load

Summary

The JIRA 'Change log' Report creator in Confluence no longer works.
When attempting to create a report the screen the 'loading' icon is displayed indefinitely and the report never loads.

This worked in 5.9.4, and broke in 6.0.0

Environment

• Confluence Version 6.0.0-OD-2016.02.1-0006

Steps to Reproduce

1. In confluence click on the '...' next to the 'Create' button in the top menu bar
2. Select 'JIRA Report' and click 'next'
3. Select 'Change Log' and click 'next'
4. Select a Project from the drop down menu, leave other fields as default and click 'create'

Expected Results

1. The report is created and the page is loaded

Actual Results

• The loading icon will be displayed indefinitely and nothing will happen, the report is not created
• The below exception is thrown in the logs

  ERROR [http-bio-1990-exec-16] [common.error.jersey.ThrowableExceptionMapper] toResponse Uncaught exception thrown by REST service: com.atlassian.confluence.extra.jira.JiraIssuesManager.retrieveXMLAsChannel(Ljava/lang/String;Ljava/util/List;Lcom/atlassian/applinks/api/ApplicationLink;ZZ)Lcom/atlassian/confluence/extra/jira/JiraIssuesManager$Channel;
   -- referer: https://<omitted> | url: /wiki/rest/create-dialog/1.0/content-blueprint/create-draft | traceId: 5427a38ed50bfa63 | userName: <omitted>
  2016-01-12 11:55:16.303976500 java.lang.NoSuchMethodError: com.atlassian.confluence.extra.jira.JiraIssuesManager.retrieveXMLAsChannel(Ljava/lang/String;Ljava/util/List;Lcom/atlassian/applinks/api/ApplicationLink;ZZ)Lcom/atlassian/confluence/extra/jira/JiraIssuesManager$Channel;
  

• Error showing in the Chrome browser Console:

  POST https://<site>.atlassian.net/wiki/rest/create-dialog/1.0/content-blueprint/create-draft 500 (Internal Server Error)
  

Workaround

"switch to advanced" prior to hitting "create" works for some users