Adobe Portfolio won't release my Domain Name

I have moved away from Adboe CC in the previous years and am using a different service to host my website.

Previously, I had tomgrahamdesign.com connected to adobe portfolio. Now I've moved it to Wordpress.

However, when navigating to that domain, I get a bunch of certificate errors and eventually it takes me to the page: https://portfolio.adobe.com/missing

I tried to follow these instructions to specifically "unhook" Adobe Portfolio from my domain: https://help.myportfolio.com/hc/en-us/articles/360051161254-When-your-domain-name-no-longer-points-to-Adobe-Portfolio

However, the controls in my portfolio are disabled. (see attacehd screenshot).

Any assistance appreciated.

Thanks in Advance.

Tom