After reviewing your installation, it looks like you are experiencing the expected behavior. Only content between TABLE tags is blank, which is normal if the tag cannot be successfully rendered.
You have used the XenForo TABLE BB-Code in your post, but you have the VaultWiki table-BB-Code using the same tag name. Since the VaultWiki BB-Code does not use the same format, the format you have used cannot be rendered.
If you intend to use the XenForo TABLE BB-Code from now on, you have two options:
- Disable the VaultWiki table-BB-Code via XenForo's BB-Code admin page; OR
- Rename the VaultWiki table-BB-Code to a different tag. For the time being I have renamed this to WTABLE on your site, but you can pick a different name on the BB-Code admin page.
If this was an import from another VaultWiki installation, or an upgrade from an installation on XenForo 1.x, that explains why the VaultWiki tag has a conflicting name. If you had used the tag in any content before upgrading to XenForo 2.x, you will need to update those tables to use your desired solution (whether that is migrating completely to the XF 2.x TABLE or changing the name of the tag you used).