Health checks for a wide range of helix-services deployed to AdobeIORuntime were failing at locations using EU region clusters! This is related to the IO Teams maintenance; as reported by an IORuntime Team member:

”Just a heads up our EU region has been removed due to a cluster level issue occurring at approximately 17:39 GMT. We have already routed traffic away and will recover the region as soon as possible.
Currently no ETA for EU being back in service.”