Symptoms
 

Receiving the following dialog:

"Authentiction Required"

Followed by a credentials window that stated:

"After you have compiled successfully, retry your last action here."

Diagnoses

This issue id due to the Azure Active Directory token being expired. K2 has notifications to remind admins that teither the admin token is going to expire or it is invalid.

Resolution

In the mail, there is a refresh token URL that can be used to issue a new token.