[@r-a-y Keymaster 14 years, 7 months ago]

The bb-attachments table wasn’t created properly.
I remember this bug when it was a bbPress plugin.

You’ll have to manually create the table yourself in PHPMyAdmin (hopefully you have access to that!).

Here’s a post on the bbpress forums with the SQL query you need:
https://bbpress.org/plugins/topic/bb-attachments/page/16/#post-4524