There are some problems causing errors of Orchestrations API responses in EU region. We are investigating and will give here more details in under an hour.
UPDATE Apr 2 11:32 CEST - The errors stopped occurring by now. We are watching it and investigating the root cause.
UPDATE Apr 2 12:05 CEST - We've found out that API servers were flooded with some unexpected requests bursts. We've upgraded the infrastructure and will find a way how to prevent such a situation for next time.