Directory category not displaying listings

Hello,

I am using the Directory plugin and I'm really struggling to get the category (archive) page to display listings.

I can see an individual listing page but when I view the category that it is in I just see a blank page. For example, I have created a directory listing in a Directory category called "Removals". The single listing can be seen at /directory/test

But when I view the actual "Removals" category, which is at /listings-category/removals/
I can not see the listing on the list page.

I'd be very grateful if someone could login and give me a hand with this. I have disabled all other plugins and it doesn't make any difference.

I have already granted WPMU with support access.

Thanks so much.

Regards,
Greg