Apple Developer Programm registration with google sites and gmail not valid

I created an Apple-ID and now im trying to enroll to the Apple Developer Programm.

I have a website on https://sites.google.com and i have a gmail account. When i try to enter those infos i get the following error: "Enter a valid email address that uses your organization’s domain name."

Does that mean that with the current setup i have i cant sign up?

Apple Developer Programm registration with google sites and gmail not valid
 
 
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