Just tested access. I had to click 'Go to the Labs' twice to access the sandbox, but I did get access.
Is it working for you now?
It has been fixed
We have a problem accessing IVT lab, when press on “Go to the labs” button in https://developer.cisco.com/site/devnet/sandbox/ it keeps reloading the same page!
You can see the behavior on this screen capture video (by Camtasia software) www.telefinity.co.uk/Sandbox_Reload.avi
This is an urgent issue we have IVR test lab reservation within 12 hours from now, your prompt action is highly appreciated
My Cisco User ID: w.alghanem