WinRm - Cannot create a WinRM listener on HTTPS due to incorrect SSL certificate

I want to use WinRM with https transport. I've bought a Comodo certificate (the error states I cannot use a self-signed certificate) with the Subject matching my FQDN (Full computer name in System) of my Windows 10 computer (not domain joined):

CN = my.domain.net OU = PositiveSSL OU = Domain Control Validated

When trying to create a https listener with the following command:

WinRm quickconfig -transport:https

I get the error message:

Error number: -2144108267 0x80338115Cannot create a WinRM listener on HTTPS because this machine does not have an appropriate certificate. To be used for SSL, a certificate must have a CN matching the hostname, be appropriate for Server Authentication, and not be expired, revoked, or self-signed.

I've installed (doubleclick the *.crt file) the certificate in several stores (local machine / personal and Trusted Root Certification Authorities) but WinRM fails to create the https listener. The http listener is working OK.

Some extra info: When using certreq to try to install the *.cer certificate, I get the error:

Element not found. 0x80070490 (WIN32: 1168 ERROR_NOT_FOUND)

How do I get WinRM working with https?