The form can not be loaded on a domain that hasn't been allowed for external form hosting
Hello,
You should enable your Power Pages domain for external form hosting in Customer Insights - Journeys:
Navigate to Settings -> Email marketing -> Domains.
Click the New button.
Enter your domain name and select Enable external form hosting.
Click Add button.
In the next step click Save and Close button.
You can ignore the warnings.
Your domain is now enabled for external form hosting and form capturing.
Petr
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