Aggregate is inaccessible

For a few days now the interface at https://XXX.appspot.com/Aggregate.html has blinked repeatedly warranting it inaccessible. It turns out that devices can also not connect.

Has anyone else experienced this issue? Suggestions on how to workaround?

Many thanks in advance -
Alex

Please note that Aggregate has reached end-of-life and is no longer being updated or supported. Consider switching to Central because it's actively developed.