Just a followup. I just tried the same example running it in preview mode within the editor and then running it from the website directly after publishing it. I got 2 different domains that were sent to Adobe.
Evidently when the HTMLcomponent runs within the Wix editor and then using preview to test it, Adobe detected the embedded code was coming from domain htmlcomponentservice.com
When running the same HTMLcomponent from the website directly after publishing it, Adobe detected a different domain. It was filesusr.com. So I guess when you are finished testing in your editor, you will have to change the api key to match the .filesusr.com domain.
This suggest you may need 2 projects defined within Adobe, one for testing within the editor and another for your published website. This means you will get 2 API keys, and you’ll need to set up the code within the HTMLcomponent appropriately.