Exception encountered, of type "Error"
[a93065cd] /wiki/api.php?action=query&drlimit=50&druser=Bob&list=deletedrevs Error from line 653 of /var/www/www.docodoco.jp/wiki/includes/exception/MWExceptionHandler.php: Class 'FormatJson' not found
Backtrace:
#0 /var/www/www.docodoco.jp/wiki/includes/exception/MWExceptionHandler.php(241): MWExceptionHandler::logError(ErrorException, string)
#1 /var/www/www.docodoco.jp/wiki/includes/AutoLoader.php(90): MWExceptionHandler::handleError(integer, string, string, integer, array)
#2 /var/www/www.docodoco.jp/wiki/includes/AutoLoader.php(90): require()
#3 [internal function]: AutoLoader::autoload(string)
#4 /var/www/www.docodoco.jp/wiki/includes/api/ApiFormatJson.php(78): spl_autoload_call(string)
#5 /var/www/www.docodoco.jp/wiki/includes/api/ApiMain.php(1420): ApiFormatJson->execute()
#6 /var/www/www.docodoco.jp/wiki/includes/api/ApiMain.php(538): ApiMain->printResult(boolean)
#7 /var/www/www.docodoco.jp/wiki/includes/api/ApiMain.php(469): ApiMain->handleException(UsageException)
#8 /var/www/www.docodoco.jp/wiki/includes/api/ApiMain.php(438): ApiMain->executeActionWithErrorHandling()
#9 /var/www/www.docodoco.jp/wiki/api.php(88): ApiMain->execute()
#10 {main}