Just posting this as it took me a little while to figure out. I was getting an obscure "Try again" error when making HTTP calls: local result,content,header = http.request(URL) log(result,content,header) result=nil content="Try again" header=nil As it turns out this is caused by setting a static IP on your Automation Controller but not having the DNS servers filled in correctly. Configurator > System > Network > Interfaces > click on "eth0"