matrix server is inaccessible

Since about one hour ago (Monday, 22 August 2022 CEST 15:00) the matrix server is not available any more in neither of the clients I tested.

The Webinterface at throws the following error:
“There was a problem communicating with the homeserver, please try again later.” displays: “502 Bad Gateway”

What is the problem and when will it be fixed?

It was a planned maintenance and it’s working again now.

Thanks for the fast reply. I can confirm that it has been working since.

Where do I see the schedule for planned maintenance?