Gitlab certificates after restore from backup

i was doing restore of a gitlab following this guide:

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.


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.