[Semediawiki-user] Special:SpecialPages blank

[Matt G. <go...@na...>]

I noticed today that I get a blank page on Special:SpecialPages

I saw that it could be a php error unreported, so I added the following to  
LocalSettings.php

error_reporting( E_ALL );
ini_set( 'display_errors', 1 );

At that point I got the following error:

Notice: Use of undefined constant SF_NS_TEMPLATE - assumed  
'SF_NS_TEMPLATE' in  
/usr/www/users/gwark/seaknature/wiki/w/LocalSettings.php on line 169

but the page would load (with the errors and a warning about the headers  
already being sent triggered by the same line in LocalSettings.php as  
above)

When I commented out that line, the Special:SpecialPages page went back to  
being blank.

Other pages seem to work fine (including other pages in the Special  
namespace - though I've not checked them all).

I'm not sure what's going on here.  I didn't make any recent changes to  
the wiki that I can think of.  I did add a second wiki to a different  
directory of the same domain, so not sure if they could be interacting  
somehow.  Also, my hosting provider switched/upgraded me to a different  
server, so I wonder if that could be where the root of the problem lies.

Any suggestions (things I can try myself and/or ask my provider about)  
would be appreciated.

Thanks,

Matt Goff