On one of my self-hosted Discourse, (fully up to date
docker_manager and a docker image only a few weeks old ) I just ran in this error upgrading. I don’t know what version the site was on before, but it was only about 30 commits behind on tests-passed.
The site seems to be fine & responding, but I figured I’d mention something before I
./launcher rebuild app
PS no, this isn’t the site I mess with server.en.yml, it’s just plain Discourse