Fixed. Indeed, the route not being able to resolve was the same issue as
https://www.vaultwiki.org/issues/3342/
Because the installer had failed to create the wiki index page.
I have fixed a number of other issues on your site, including the social error you mentioned. I see that you are running your forum under Debug Mode. I just want to mention that using VaultWiki under debug mode, you will encounter a lot more errors, due to debug mode treating everything from minor notices and warnings as if they were fatal errors. When debug mode is turned off, these errors shouldn't prevent script execution, but they would still be logged to your AdminCP for review.
On my site, I only have debug mode turned on inside the AdminCP with this config.php section:
Code:
if ($_SERVER['REMOTE_ADDR'] == 'MY_IP_ADDRESS' AND strpos($_SERVER['SCRIPT_FILENAME'], 'admin.php') !== false)
{
$config['debug'] = true;
}
This way I can still use the Development tab, but small errors won't prevent me from doing things in the front-end.
I will also apply the next upgrade for you when in comes out, which should eliminate a significant number of warnings/notices.