Thread:Project:Support desk/Fatal exception of type MWException after upgrade to MW from 1.19 to 1.20/reply (12)

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750

Warning: array_map expects parameter 1 to be a valid callback, no array or string given in /home/ge192287/public_html/szkolawkulturze.pl/includes/Exception.php on line 750 [ff5f0bfd] / Exception from line 38 of /home/ge192287/public_html/szkolawkulturze.pl/includes/ScopedCallback.php: Provided callback is not valid.

Backtrace:


 * 1) 0 /home/ge192287/public_html/szkolawkulturze.pl/includes/cache/MessageCache.php(325): ScopedCallback->__construct
 * 2) 1 /home/ge192287/public_html/szkolawkulturze.pl/includes/cache/MessageCache.php(871): MessageCache->load
 * 3) 2 /home/ge192287/public_html/szkolawkulturze.pl/includes/cache/MessageCache.php(791): MessageCache->getMsgFromNamespace
 * 4) 3 /home/ge192287/public_html/szkolawkulturze.pl/includes/cache/MessageCache.php(729): MessageCache->getMessageFromFallbackChain
 * 5) 4 /home/ge192287/public_html/szkolawkulturze.pl/includes/Message.php(878): MessageCache->get
 * 6) 5 /home/ge192287/public_html/szkolawkulturze.pl/includes/Message.php(560): Message->fetchMessage
 * 7) 6 /home/ge192287/public_html/szkolawkulturze.pl/includes/Message.php(649): Message->toString
 * 8) 7 /home/ge192287/public_html/szkolawkulturze.pl/includes/Title.php(375): Message->text
 * 9) 8 /home/ge192287/public_html/szkolawkulturze.pl/includes/Wiki.php(121): Title::newMainPage
 * 10) 9 /home/ge192287/public_html/szkolawkulturze.pl/includes/Wiki.php(137): MediaWiki->parseTitle
 * 11) 10 /home/ge192287/public_html/szkolawkulturze.pl/includes/Wiki.php(530): MediaWiki->getTitle
 * 12) 11 /home/ge192287/public_html/szkolawkulturze.pl/includes/Wiki.php(467): MediaWiki->main
 * 13) 12 /home/ge192287/public_html/szkolawkulturze.pl/index.php(49): MediaWiki->run
 * 14) 13 {main}

I got this. What can I do ?