Self Signed Certificate. - Not Working

I think I am missing something.

Have HestiaCP installed, created user, website etc. in a test lab. Now I want to install a SELF SIGNED Cert (not LE at this time) for testing purposes. We are migrating several sites from another panel and need an SSL for testing as they require SSL.

When we enable SSL for the website, click on " Generate Self-Signed SSL Certificate", all we get is a SSL Key and nothing else. No Save Button, only a “BACK” button that does nothing when clicked.