Editor and end-user Experience requests to Chameleon servers are being rejected due to an issue with Chameleon's caching layer.
The issue may be due to an outage of a Chameleon service provider Compose. Track Compose's ongoing outage here: https://status.compose.com/incidents/5qgqnq95wvc8
Chameleon's engineering team is actively investigating the issue, and working on sourcing another service provider.
We will make updates here regarding the continued investigation and a resolution.