https://academy.mendix.com/ does not respond at all. No mention of any disruption yet on https://status.mendix.com/ but likely this will either be restored quickly or mention there.
I think there is a system problem. This link dose not respond or it is very slowly
You can check the status of the Mendix platform services here: https://status.mendix.com/
I created a ticket yesterday and it is up again.