Hello,
I install a single server model and found this problem too. And the run scan report show summary of this :
Task Name : Check server SSL certificate, Task Result : Failure, Task State : Completed
3/15/2016 3:46:34 PM : Check server SSL certificate - Started
3/15/2016 3:46:34 PM : Check server SSL certificate - Checking on SSL Certficate :
3/15/2016 3:46:34 PM : Check server SSL certificate - Finished
No way to solve this ha ha.