var net/http.errCrossOriginRequest
2 uses
net/http (current package)
csrf.go#L151: return errCrossOriginRequest
csrf.go#L178: errCrossOriginRequest = errors.New("cross-origin request detected from Sec-Fetch-Site header")
The pages are generated with Golds v0.8.4. (GOOS=linux GOARCH=amd64)