@Ali Syed (NS DevTools QA) that did the trick. I just skipped that step. Thing is, I was following the guide on the documentation and it states to add the domain, I'm guessing that's outdated now?

Well in some cases, users with some special domains might need to add a domain which is rare. But if you are just working with production just ignore it. Infact we are working on new UI that will reduce the confusion hopefully.