Fatal error: Uncaught Error: Call to a member function getCode() on null in C:\xampp\htdocs\mediawiki\includes\user\User.php:1594
Stack trace:
#0 C:\xampp\htdocs\mediawiki\includes\user\User.php(5272): User::getDefaultOptions()
#1 C:\xampp\htdocs\mediawiki\includes\user\User.php(2884): User->loadOptions()
#2 C:\xampp\htdocs\mediawiki\includes\context\RequestContext.php(364): User->getOption('language')
#3 C:\xampp\htdocs\mediawiki\includes\Message.php(380): RequestContext->getLanguage()
#4 C:\xampp\htdocs\mediawiki\includes\Message.php(1275): Message->getLanguage()
#5 C:\xampp\htdocs\mediawiki\includes\Message.php(842): Message->fetchMessage()
#6 C:\xampp\htdocs\mediawiki\includes\Message.php(934): Message->toString('text')
#7 C:\xampp\htdocs\mediawiki\includes\exception\MWExceptionRenderer.php(200): Message->text()
#8 C:\xampp\htdocs\mediawiki\includes\exception\MWExceptionRenderer.php(300): MWExceptionRenderer::msg('dberr-problems', 'Sorry! This sit...')
#9 C:\xampp\htdocs\mediawiki\includes\exception\MWExceptionRendere in C:\xampp\htdocs\mediawiki\includes\user\User.php on line 1594