Visual Editor Insert/Edit Link not working

I’m new to WordPress, but for the life of me I can’t get the Inset/Edit Link to do anything in the visual editor.
I have deactivated all my plugins. Set my theme back to TwentyFourteen.
I have followed this article
Tried a different browser Chrome and Safari on the local machine – Chrome on a remote machine.
Enabled Script_Debug (which assume is working as there is an entry in the javascript console “JQMIGRATE: Logging is active”)
I’ve also checked the console and can’t find any errors.
The only thing I can find is if I drill down through the page, I’ve found the following html relating to the button:

<div id="mce_25" class="mce-widget mce-btn mce-disabled" tabindex="-1" aria-labelledby="mce_25" role="button" aria-label="Insert/edit link" aria-disabled="true" aria-pressed="null"><button role="presentation" type="button" tabindex="-1"><i class="mce-ico mce-i-link"></i></button></div>
<button role="presentation" type="button" tabindex="-1"><i class="mce-ico mce-i-link"></i></button>
<i class="mce-ico mce-i-link"></i>
::before
</i>
</button>
</div>

I can’t link to the site as it’s a local install (and in the admin side of it).

Is this just something that is disabled now or am I missing something?