Reading your documentation, after I install and activate the theme I should get a link suggesting a number of plug-ins. I don’t get that either.
I’m not really sure why not. I’ve tried disabling all the security related plug-ins (e.g. WordFence) and still don’t get this link when installing the theme.
Do you not get it on the path Appearance -> Install Plugins in your site admin area after activating Jevelin theme?
If not then would you mind if I log in to your site and do some troubleshooting? If this is ok then could you please share me your site log in details privately by adding them in the box having text “Click here to share private content. Only you and forum moderators will be able to see it.”?