Getting an error with domain mapping

Just after the most recent update with either ProSites and/or Domain Mapping we are receiving the following error.

Notice: Constant COOKIE_DOMAIN already defined in .../wp-content/plugins/domain-mapping/inc/sunrise.php on line 13

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at .../wp-content/plugins/domain-mapping/inc/sunrise.php:13) in .../wp-content/plugins/pro-sites/pro-sites-files/lib/ProSites/Helper/Session.php on line 29

Also getting this on all the mapped domains:

Fatal error: Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0