Need help Error Api when create SubDomain and active ssl

Hi support

I have a problem with the site. When I create a subdomain and activate the autossl =1 feature, it creates the domain with the https security certificate, but the site does not work, I see this msg "Found message appears.
The requested URL was not found on this server" . And When I change the setting to autossl to 0, the site works normally, but the security ssl certificate does not work.

Please provide a correct code to automatically activate the security ssl certificate and make the site work without problems. Thank you for your understanding.

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