Question Wildcard SSL/TLS certificate for subdomain

[_Andreas_]

I have a certificate for *.example.com
I want to use this on a Webspace sub.example.com
After installing it it shows in plesk under SSL/TLS Certificates;

Wildcard SSL_TLS certificate -> not secured
*.sub.example.com

To have it working I would expect there *.example.com

Is this setup supported at all ?

Background:
I have already a Webspace example.com
and I cannot make there a subdomain sub.example.com for organizational reasons.
Thats why I set up sub.example.com as (main) Webspace

 

[_Andreas_]

The Page is valid when opening with a browser, no certificate errors.
Looks like just to be an issue with the plesk GUI.

 

[learning_curve]

....Background:
I have already a Webspace example.com
and I cannot make there a subdomain sub.example.com for organizational reasons.
Thats why I set up sub.example.com as (main) Webspace

You have possibly answered your own question in that section above.
Let's Encrypt Wildcard Certificates work perfectly in Plesk > IF < you have domains / sub-domains (and all of their associated DNS) setup correctly.
We have lots, setup as per the last line above i.e. all sub-domains are exactly that; sub-domains of domains. We have no issues at all and never have had.
You may need to re-think those 'organizational reasons' and /or make any required changes to your current setup.