Hi Eddy,
We moved Sandbox hosting server from a 3rd party data center to Microsoft data center where TheGreenButton is hosted yesterday. This supposes to be a transparent action to forum users expect better performance than before. But it looks like there is a mishandling of the site redirect during the move. We are working to get this fixed asap.
The Sandbox forum will run as it is today.
Regards,
Quan Wang [MSFT]