I've been getting multiple inquires about finding log files in SaaS. As of 3600.0.0, Kibana is no longer available in SaaS. READ: https://blackboard.secure.force.com/btbb_articleview?id=kA41O000000Cgaa
To stay up to date on changes like this to Learn - keep abreast of announcements on Behind the Blackboard. This video shows you how you can subscribe to receive an email when a new release comes out with changes like this.
Here is our latest help documentation about getting the log files from SaaS: https://help.blackboard.com/Learn/Administrator/SaaS/System_Management/Logs