Gitlab certificates after restore from backup

Hello,
i was doing restore of a gitlab following this guide:
https://docs.gitlab.com/12.9/ee/raketasks/backup_restore.html#restore-for-omnibus-gitlab-installations

After restore, i can access server, data are there, login an dpassword works too.
However, in web browser my certificate is invalid and i also can not clonse repositories with my old certificates.

image

According to the guide (link above) i copied gitlab.rb and ssl/ directory to new server.
However i have described issues.

Am i missing something ?
Or is it impossible to do?

Thank you.