Fatal error: Uncaught Error: Class "FormatJson" not found in /home/gamersto/mediawiki/includes/exception/MWExceptionHandler.php:794
Stack trace:
#0 /home/gamersto/mediawiki/includes/exception/MWExceptionHandler.php(336): MWExceptionHandler::logError(Object(ErrorException), 'error', 'error', 'mwe_handler')
#1 /home/gamersto/mediawiki/includes/AutoLoader.php(244): MWExceptionHandler::handleError(8, 'require(): Read...', '/home/gamersto/...', 244)
#2 /home/gamersto/mediawiki/includes/AutoLoader.php(244): require('/home/gamersto/...')
#3 /home/gamersto/mediawiki/includes/exception/MWExceptionHandler.php(756): AutoLoader::autoload('FormatJson')
#4 /home/gamersto/mediawiki/includes/exception/MWExceptionHandler.php(193): MWExceptionHandler::logException(Object(Error), 'mwe_handler')
#5 /home/gamersto/mediawiki/includes/exception/MWExceptionHandler.php(247): MWExceptionHandler::rollbackPrimaryChangesAndLog(Object(Error), 'mwe_handler')
#6 /home/gamersto/mediawiki/includes/exception/MWExceptionHandler.php(216): MWExceptionHandler::handleException(Object(Error), 'mwe_handler')
#7 [internal function]: MWExceptionHandler::handleUncaughtException(Object(Error))
#8 {main}
thrown in /home/gamersto/mediawiki/includes/exception/MWExceptionHandler.php on line 794