Optimizely change history: Campaign user interface partially unavailable

Optimizely reported a major partial outage of Campaign’s graphical interfaces for managing campaigns and content, including the EMEA Region interface, affecting only some users. It started at 2026-07-17 16:59 UTC and was marked resolved at 2026-07-17 17:17 UTC; the computed duration was 17 min. The vendor identified the affected component and resolved the problem.