Thread:Project:Support desk/Update previous MW 1.16.5 to 1.17.0 throws an 500 internal server error/reply

I habe the same 500 error but was able to trace it down to:

Invalid or missing localisation cache.

Backtrace:


 * 0 C:\inetpub\wwwroot\_sdwiki\includes\LocalisationCache.php(268): LocalisationCache->initLanguage('en')
 * 1 C:\inetpub\wwwroot\_sdwiki\includes\LocalisationCache.php(211): LocalisationCache->loadItem('en', 'deps')
 * 2 C:\inetpub\wwwroot\_sdwiki\includes\LocalisationCache.php(536): LocalisationCache->getItem('en', 'deps')
 * 3 C:\inetpub\wwwroot\_sdwiki\includes\LocalisationCache.php(358): LocalisationCache->recache('de')
 * 4 C:\inetpub\wwwroot\_sdwiki\includes\LocalisationCache.php(268): LocalisationCache->initLanguage('de')
 * 5 C:\inetpub\wwwroot\_sdwiki\includes\LocalisationCache.php(211): LocalisationCache->loadItem('de', 'fallback')
 * 6 C:\inetpub\wwwroot\_sdwiki\languages\Language.php(2853): LocalisationCache->getItem('de', 'fallback')
 * 7 C:\inetpub\wwwroot\_sdwiki\languages\Language.php(179): Language::getFallbackFor('de')
 * 8 C:\inetpub\wwwroot\_sdwiki\languages\Language.php(142): Language::newFromCode('de')
 * 9 C:\inetpub\wwwroot\_sdwiki\includes\StubObject.php(126): Language::factory('de')
 * 1) 10 C:\inetpub\wwwroot\_sdwiki\includes\StubObject.php(103): StubContLang->_newObject
 * 2) 11 C:\inetpub\wwwroot\_sdwiki\includes\StubObject.php(57): StubObject->_unstub('getCode', 5)
 * 3) 12 C:\inetpub\wwwroot\_sdwiki\includes\StubObject.php(121): StubObject->_call('getCode', Array)
 * 4) 13 [internal function]: StubContLang->__call('getCode', Array)
 * 5) 14 C:\inetpub\wwwroot\_sdwiki\includes\MessageCache.php(525): StubContLang->getCode
 * 6) 15 [internal function]: MessageCache->get('mainpage', true, true)
 * 7) 16 C:\inetpub\wwwroot\_sdwiki\includes\StubObject.php(58): call_user_func_array(Array, Array)
 * 8) 17 C:\inetpub\wwwroot\_sdwiki\includes\StubObject.php(76): StubObject->_call('get', Array)
 * 9) 18 [internal function]: StubObject->__call('get', Array)
 * 10) 19 C:\inetpub\wwwroot\_sdwiki\includes\GlobalFunctions.php(781): StubObject->get('mainpage', true, true)
 * 11) 20 C:\inetpub\wwwroot\_sdwiki\includes\GlobalFunctions.php(744): wfMsgGetKey('mainpage', true, true, true)
 * 12) 21 C:\inetpub\wwwroot\_sdwiki\includes\GlobalFunctions.php(688): wfMsgReal('mainpage', Array, true, true)
 * 13) 22 C:\inetpub\wwwroot\_sdwiki\includes\Title.php(318): wfMsgForContent('mainpage')
 * 14) 23 C:\inetpub\wwwroot\_sdwiki\includes\Wiki.php(122): Title::newMainPage
 * 15) 24 C:\inetpub\wwwroot\_sdwiki\index.php(60): MediaWiki->checkInitialQueries(NULL, 'view')
 * 16) 25 {main}

any help would much be appreciated!