I just upgraded Sentry from 9.1.2 to 20.12.1 on Kubernetes and it all worked fine.
However, when I try to change certain settings (like enabling SAML, among others), I get a server error. Looking at the sentry-web logs, it’s always the same;
[ERROR] sentry: option.failed-lookup (key=‘system.url-prefix’)
It appears that this value does not exist, but should? How can I fix this?