Sigma Computing change history: Sigma organizations hosted on AWS US are not loading

A critical outage left Sigma organizations hosted on AWS US stuck on loading screens, with impact starting approximately 20:39 UTC November 08, 2023. The incident record ran from 2023-11-08 20:53 UTC to resolution at 2023-11-08 21:54 UTC (computed duration: 1 h 0 min); mitigation measures restored app loading.