Custom Hostnet domain in Adobe Portfolio not working

Hello,

I have a W.I.P Adobe Portfolio website. It hasn't been published yet. I want to publish it under my custom domain. First time I tried, it worked for a while, but when I checked a few days later, I found that the domain had been reset to ''.myportfolio.com'', instead of the ''.com'' custom domain I intended to use.

I filled in the correct DNS values on the hosting service, I waited for the changes to be put through, but nothing worked. I've shared a screenshot blow of the message I get when I press ''To Apply" (sensitive information blurred for obvious reasons).

Can someone help me with this?