Snapshot will not backup

The server encountered an internal error or
misconfiguration and was unable to complete
your request.

Please contact the server administrator
and inform them of the time the error occurred,
and the actions you performed just before this error.

More information about this error may be available
in the server error log.

Apache Server at ______ Port 80

This was the log file from Snapshot
[Cron][2016-11-01 18:05:32][Warning] Immediate hook misfired, kickstart backup processing
[Cron][2016-11-01 18:36:01][Warning] Immediate hook misfired, kickstart backup processing
[Cron][2016-11-01 19:35:54][Warning] Immediate hook misfired, kickstart backup processing
[Cron][2016-11-01 20:36:06][Warning] Immediate hook misfired, kickstart backup processing
[Cron][2016-11-01 20:36:17][Error] Error processing automatic backup: unknown:unknown
[Cron][2016-11-02 18:05:38][Warning] Immediate hook misfired, kickstart backup processing
[Cron][2016-11-02 18:31:47][Warning] Immediate hook misfired, kickstart backup processing
[Cron][2016-11-02 19:32:05][Warning] Immediate hook misfired, kickstart backup processing
[Cron][2016-11-02 20:32:58][Warning] Immediate hook misfired, kickstart backup processing
[Cron][2016-11-02 20:33:19][Error] Error processing automatic backup: unknown:unknown