Seeing 503s with gonexus.dev

We have this proxied and it’s showing Service Unavailable in the UI.

GOPROXY=https://gonexus.dev GOPATH=$(pwd)/r go get golang.org/x/text@v0.3.8

go: github.com/Azure/go-ansiterm@v0.0.0-20210617225240-d185dfc1b5a1: reading https://gonexus.dev/github.com/%21azure/go-ansiterm/@v/v0.0.0-20210617225240-d185dfc1b5a1.mod: 503 Service Unavailable