Update 9/10/18
Lynda.com is reporting that their intermittent connectivity issues experienced earlier today have been resolved. If you have any questions or continue to experience trouble, please write ISC Client Care at help@isc.upenn.edu.
Original
Lynda.com is currently experiencing an intermittent connectivity issue. They are investigating the cause of the problem and working towards a fix.
This problem is impacting all Lynda.com users, not just those at Penn. We will send out additional information as soon as it becomes available.