Thread:Project:Support desk/can't access special pages: internal server error

Hey there,

i've got a big problem: all my special pages are leading to an internal server error. what i've already tried:

- deactivated all extensions

- updated to 1.22.6

- maintenance/update.php

i tried to log some actions, here is one log:

Start request GET /wiki/Spezial:Spezialseiten

HTTP HEADERS:

ACCEPT: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

ACCEPT-ENCODING: gzip, deflate

ACCEPT-LANGUAGE: de,en-US;q=0.7,en;q=0.3

CACHE-CONTROL: max-age=0

CONNECTION: keep-alive

COOKIE: XXX_session=ss98hfeob8qboum1u518avaaq7; XXXUserID=22; XXXUserName=Biedermann; XXXToken=325b599c56251f88ecd5f0584f38c159; vector-nav-p-tb=true

DNT: 1

HOST: www.XXX.de

USER-AGENT: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0

CACHES: EmptyBagOStuff[main] SqlBagOStuff[message] SqlBagOStuff[parser]

[cookie] session_set_cookie_params: "0", "/", "", "", "1"

Class LanguageDe_formal not found; skipped loading

LocalisationCache: using store LCStore_DB

Connected to database 0 at XXX.de

Class LanguageDe not found; skipped loading

Unstubbing $wgParser on call of $wgParser::setHook from ExtDynamicPageList::setupDPL

Parser: using preprocessor: Preprocessor_DOM

Fully initialised

User: cache miss for user 22

User: loading options for user 22 from database.

User: logged in from session

User: loading options for user 22 from override cache.

Connected to database 0 at XXX.de

MessageCache::load: Loading de-formal... got from global cache

Unstubbing $wgLang on call of $wgLang::_unstub from ParserOptions::__construct

could somebody help me?