The network sites are blank when created

Hi there,

When a site on the network is being created it is blank (by blank I mean showing the server-side index-page). It's not showing the theme and I can't go to the administration of the site either. I have set everything up as per this ticket: https://premium.wpmudev.org/forums/topic/blank-subdomain-on-site-creation#post-848504, but still can't find the issue.

Do I have to have the plugin called "New Blog Template" installed for it to work?

Looking forward to hearing from you.

Best regards,
Allan