I'm currently working my way through various learning paths on Microsoft Learn. For a couple of days now I've been unable to do any of the interactive exercises. I am able to instantiate a new sandbox but the Cloud Shell is unable to sign me in. I can login to the Azure Portal and access the sandbox as well as the Cloud Shell from there. However, the Cloud Shell window alongside the Learn documentation does not work.
After a module has checked and confirmed the existence of an active sandbox, the Cloud Shell tries to sign me in but without success. Instead the page gets reloaded and the same process is repeated for a couple of times until finally I'm prompted with the message: "We couldn't sign you in. Please try again."
The issue persists after I sign in again. The page gets reloaded before I'm asked to sign in yet again, which prevents me from accessing the exercise instructions at all. I've cleared my web browser's cache and also waited for a couple of hours but nothing works. Studying the requests that are being sent I can see that the following two results in a 401 Unauthorized error:
I would very much appreciate any support in solving this authentication issue.