issue launching powershell in sandbox tutorial

Question

Training issue

As I go thru the first module exploring the sandbox I am unable to launch the powershell .  I get a “sign in with your account” – I do that, it defaults to [******@kpmg.com] which is my active corporate account, and it appears to authenticate. The sandbox says it is active, but the powershell piece does not launch, and the prompt to sign in returns. It just loops to that while the sandbox counter is decrementing.