Increased error rate in application and REST APIs

Incident Report for Optimizely Service

Resolved

We have resolved an issue that was resulting in some users receiving errors in the application and configuration-related REST APIs (500 or 502 status codes). There was no impact to experiment execution or ingestion related to the issue.
Posted Jun 22, 2026 - 13:03 UTC
This incident affected: Feature Experimentation (Application UI, Optimizely REST API) and Web Experimentation (App UI).
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