Fatal error: Uncaught Error: Class "Transliterator" not found in /var/www/html/lib/pkp/classes/oai/OAIUtils.php:30 Stack trace: #0 /var/www/html/lib/pkp/classes/oai/OAIUtils.php(178): PKP\oai\OAIUtils::init() #1 /var/www/html/lib/pkp/lib/vendor/composer/ClassLoader.php(571): include('...') #2 /var/www/html/lib/pkp/lib/vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile() #3 /var/www/html/lib/pkp/classes/oai/OAI.php(67): Composer\Autoload\ClassLoader->loadClass() #4 /var/www/html/classes/oai/ojs/JournalOAI.php(53): PKP\oai\OAI->__construct() #5 /var/www/html/pages/oai/OAIHandler.php(42): APP\oai\ojs\JournalOAI->__construct() #6 [internal function]: APP\pages\oai\OAIHandler->index() #7 /var/www/html/lib/pkp/classes/core/PKPRouter.php(334): call_user_func() #8 /var/www/html/lib/pkp/classes/core/PKPPageRouter.php(277): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest() #9 /var/www/html/lib/pkp/classes/core/Dispatcher.php(165): PKP\core\PKPPageRouter->route() #10 /var/www/html/lib/pkp/classes/core/PKPApplication.php(387): PKP\core\Dispatcher->dispatch() #11 /var/www/html/index.php(21): PKP\core\PKPApplication->execute() #12 {main} thrown in /var/www/html/lib/pkp/classes/oai/OAIUtils.php on line 30