Exception encountered, of type "Error"
[41ae32e1] /mediawiki/index.php?title=File:KahanaCV_(7)_(1).pdf&action=edit&redlink=1 Error from line 653 of /var/www/html/mediawiki-1.26.4/includes/exception/MWExceptionHandler.php: Class 'FormatJson' not found
Backtrace:
#0 /var/www/html/mediawiki-1.26.4/includes/exception/MWExceptionHandler.php(241): MWExceptionHandler::logError(ErrorException, string)
#1 /var/www/html/mediawiki-1.26.4/includes/AutoLoader.php(90): MWExceptionHandler::handleError(integer, string, string, integer, array)
#2 /var/www/html/mediawiki-1.26.4/includes/AutoLoader.php(90): require()
#3 [internal function]: AutoLoader::autoload(string)
#4 /var/www/html/mediawiki-1.26.4/includes/filerepo/ForeignAPIRepo.php(207): spl_autoload_call(string)
#5 /var/www/html/mediawiki-1.26.4/includes/filerepo/file/ForeignAPIFile.php(63): ForeignAPIRepo->fetchImageQuery(array)
#6 /var/www/html/mediawiki-1.26.4/includes/filerepo/FileRepo.php(394): ForeignAPIFile::newFromTitle(Title, ForeignAPIRepo)
#7 /var/www/html/mediawiki-1.26.4/includes/filerepo/ForeignAPIRepo.php(120): FileRepo->newFile(Title, boolean)
#8 /var/www/html/mediawiki-1.26.4/includes/filerepo/FileRepo.php(426): ForeignAPIRepo->newFile(Title)
#9 /var/www/html/mediawiki-1.26.4/includes/filerepo/RepoGroup.php(158): FileRepo->findFile(Title, array)
#10 /var/www/html/mediawiki-1.26.4/includes/GlobalFunctions.php(3672): RepoGroup->findFile(Title, array)
#11 /var/www/html/mediawiki-1.26.4/includes/page/WikiFilePage.php(60): wfFindFile(Title)
#12 /var/www/html/mediawiki-1.26.4/includes/page/WikiFilePage.php(126): WikiFilePage->loadFile()
#13 /var/www/html/mediawiki-1.26.4/includes/page/Article.php(2049): WikiFilePage->getFile()
#14 /var/www/html/mediawiki-1.26.4/includes/MediaWiki.php(410): Article->__call(string, array)
#15 /var/www/html/mediawiki-1.26.4/includes/MediaWiki.php(285): MediaWiki->initializeArticle()
#16 /var/www/html/mediawiki-1.26.4/includes/MediaWiki.php(714): MediaWiki->performRequest()
#17 /var/www/html/mediawiki-1.26.4/includes/MediaWiki.php(508): MediaWiki->main()
#18 /var/www/html/mediawiki-1.26.4/index.php(41): MediaWiki->run()
#19 {main}