Can't install Slack integration on PDI

[Aidan]

I'm attempting to set up Slack as a messaging client for Virtual Agent but can't get past the initial install page.

I have the necessary plugins installed, so can see the following;

After clicking "integrate with now virtual agent" a new tab opens with an about:blank page.

Popups are enabled for the site but I am seeing the following error in the log and on screen.

So I'm assuming that I've missed a step or the plugin is not correctly installed.  Any clues?

[Hari Prasath]

@Aidan 

Please make sure that you've installed this plugin ServiceNow IntegrationHub Installer. You can install this Your instance action-> Active plugin.

Please make the answer as helpful, if helped you accordingly.

Thanks,

Hari

[Aidan]

Integration Hub plugins are already installed and working.

[Sadashiv H]

Any update on this?

[RaghavSh]

Do you have slack installed in your machine? 
Ideally when you do it for your org, your slack admin approves or give you the access to approve