Fatal error: Uncaught Error: Class 'FormatJson' not found in /homepages/6/d405290359/htdocs/mediawiki/includes/exception/MWExceptionHandler.php:689 Stack trace: #0 /homepages/6/d405290359/htdocs/mediawiki/includes/exception/MWExceptionHandler.php(216): MWExceptionHandler::logError(Object(ErrorException), 'error', 'warning') #1 /homepages/6/d405290359/htdocs/mediawiki/includes/AutoLoader.php(109): MWExceptionHandler::handleError(2, '"continue" targ...', '/homepages/6/d4...', 297, Array) #2 /homepages/6/d405290359/htdocs/mediawiki/includes/AutoLoader.php(109): require() #3 [internal function]: AutoLoader::autoload('FormatJson') #4 /homepages/6/d405290359/htdocs/mediawiki/includes/exception/MWExceptionHandler.php(653): spl_autoload_call('FormatJson') #5 /homepages/6/d405290359/htdocs/mediawiki/includes/exception/MWExceptionHandler.php(111): MWExceptionHandler::logException(Object(Wikimedia\Rdbms\DBQueryError), 'mwe_handler') #6 /homepages/6/d405290359/htdocs/mediawiki/includes/exception/MWExceptionHandler.php(148): MWExcepti in /homepages/6/d405290359/htdocs/mediawiki/includes/exception/MWExceptionHandler.php on line 689