I haven't access to my subdomains with www.* in domain address

I haven’t access to my subdomains with www.* in domain address.
Without www.* all work properly.
In Crome I receive:

This site can’t provide a secure connection

www.xxxx.xxxxxxx.com uses an unsupported protocol.
In Firefox:

What could be the reason?

Have you already checked out the #CommunityTip that covers this issue?

It’s this:

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Thank you.
I understand that www.subdomain.domain.com is not supported.
In another case, I don’t want my users will see errors.
If Advanced Certificates will help me?

Hi @devijen,

Yes, you can specify custom hostnames if you purchase the Advanced Certificate Manager, so you could add www for your subdomains, and these would then work as expected.

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Hi @domjh,
Thank you very much.
That’s exactly what I did.

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