Leanx.eu down for over 24h

Hello,

Linked resource leanx hasn’t worked since monday.
Do you have any information when it would be available again?
I found it crucial for the data engineer training.
What is more I would like to atempt to a certification exam and without database schema/ documentation it might be very hard to complete.
Is this resource provided also for exam excercises?
What tables are used in data engineer certification exam?

Regards,