We're currently upgrading our Aurora Compute zone in Amsterdam. During the upgrade, no downtime of the instances is expected but the control panel will be unavailable.

update:

We successfully finished upgrading our Aurora Compute zone in Amsterdam. During the maintenance we experienced a issue with the ipv6 connection on one of our Hypervisors. If your VM was running on this Hypervisor this resulted in a short interruption. The connectivity via ipv4 was not affected.