Changing Custom Domain

Hey Everyone,

Can anyone advise as to how to change their custom domain? I’ve created a subdomain already and created the new CNAME in my domain registry (which is 123reg.co.uk) and its not updating on my app.

I copied my authID and typed in subdomain in codepen.io but yet still the app can’t validate the change.

Please help if possible as I’m looking to launch the app very soon.

Ever Grateful You All,
Alan

I haven’t done any of this myself, but I’ve read that it can take up to a half hour for the updates to process.