Problems with Letsencrypt Certifikation

Hi i installed and run letsencrypt. Test worked fine, so i tried it without test checkbox. It says done and i have a certifikat, but https didnt work already.

On Introduction it says restart appache2. But that didnt work on WebGui, so i made it with ssh.

→ univention-certificate list

List all certificates
01 ucs-1.lan.xyz.de
02 ucs-sso-ng.lan.xyz.de
03 ucs-sso.lan.xyz.de

So what should i do?

mfG

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