I cannot set up the admin user for my Google Workspacke starter plan!

Question:
I bought the Google Workspace Starter plan via Wix.com, then according the guide I began to set up the admin user for the business email account, but the warning words shows that" Your admin user for funand.cool wasn’t set up because of a technical issue. [Contact Customer Care] for help." I would like to know what’s wrong with that and how the solve the problem? Thank you!

Product:
Google Workspace by Wix.com

What are you trying to achieve:
I want to set up the admin account for the business email.

Have you resolved the issue?