We are currently observing hardware problems on the main EasyChair server.
The most likely cause is that the system disk is malfunctioning.
We contacted our hosting service provider to resolve the problem but do not know how long it will take on their side to fix it.
We have several live replicas of all data on backup servers, so there is no data lost.
We are configuring a new server, which we will use if the disk replacement takes longer than we expected.