@steve Yes, that's what it looks like:

Caused by: java.lang.UnsupportedClassVersionError: javassist/util/proxy/MethodFilter : Unsupported major.minor version 51.0

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira