The MediaWiki extension Score has the following problem:

Deprecated: Use of FileBackend::__construct called without "wikiID". was
deprecated in MediaWiki 1.23. [Called from FileBackendStore::__construct in
/var/www/w/git/includes/filebackend/FileBackendStore.php at line 68] in
/var/www/w/git/includes/debug/Debug.php on line 301

Deprecated: Use of FileBackend::__construct called with non-object
"lockManager". was deprecated in MediaWiki 1.23. [Called from
FileBackendStore::__construct in
/var/www/w/git/includes/filebackend/FileBackendStore.php at line 68] in
/var/www/w/git/includes/debug/Debug.php on line 301

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Needs to modify Score::getBackend(), so that the default config doesn't create a new FSFileBackend object without specifying wikiID and a lockManager. The appropriate values are probably just wfWikiId() and new NullLockManager( array() ) respectively.

More at 

Bug 58610 - Score constructs an FSBackend in a deprecated fashion

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