Thread:Project:Support desk/Problem With File Upload: Could not acquire lock for "mwstore://local-backend/local-public/1/1e"./reply (19)

Uh, It seems that when I posted this:

'local-thumb'  => "{$directory}/thumb",

It should be this instead:

'local-thumb'  => "{$wgUploadDirectory}/thumb",

Basically, the error is that there's a variable named $directory in your LocalSettings.php at the specified line which is not defined. Change it by $wgUploadDirectory or replace it by a hardcoded value.