Warning: Array to string conversion in /home/u1643084/public_html/conferences/lib/pkp/classes/i18n/Locale.php on line 548

Fatal error: Uncaught TypeError: Symfony\Component\HttpFoundation\Request::formatLocale(): Argument #1 ($locale) must be of type string, array given in /home/u1643084/public_html/conferences/lib/pkp/lib/vendor/symfony/http-foundation/Request.php:1743 Stack trace: #0 [internal function]: Symfony\Component\HttpFoundation\Request::formatLocale() #1 /home/u1643084/public_html/conferences/lib/pkp/lib/vendor/symfony/http-foundation/Request.php(1690): array_map() #2 /home/u1643084/public_html/conferences/lib/pkp/classes/i18n/Locale.php(563): Symfony\Component\HttpFoundation\Request->getPreferredLanguage() #3 /home/u1643084/public_html/conferences/lib/pkp/classes/i18n/Locale.php(141): PKP\i18n\Locale->getPreferredLocale() #4 /home/u1643084/public_html/conferences/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Support/Facades/Facade.php(363): PKP\i18n\Locale->getLocale() #5 /home/u1643084/public_html/conferences/lib/pkp/classes/core/traits/LocalizedData.php(66): Illuminate\Support\Facades\Facade::__callStatic() #6 /home/u1643084/public_html/conferences/lib/pkp/classes/core/traits/LocalizedData.php(33): PKP\core\DataObject->getLocalePrecedence() #7 /home/u1643084/public_html/conferences/lib/pkp/classes/core/DataObject.php(77): PKP\core\DataObject->getBestLocalizedData() #8 /home/u1643084/public_html/conferences/pages/article/ArticleHandler.php(501): PKP\core\DataObject->getLocalizedData() #9 [internal function]: APP\pages\article\ArticleHandler->download() #10 /home/u1643084/public_html/conferences/lib/pkp/classes/core/PKPRouter.php(327): call_user_func() #11 /home/u1643084/public_html/conferences/lib/pkp/classes/core/PKPPageRouter.php(249): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest() #12 /home/u1643084/public_html/conferences/lib/pkp/classes/core/Dispatcher.php(157): PKP\core\PKPPageRouter->route() #13 /home/u1643084/public_html/conferences/lib/pkp/classes/core/PKPApplication.php(429): PKP\core\Dispatcher->dispatch() #14 /home/u1643084/public_html/conferences/index.php(21): PKP\core\PKPApplication->execute() #15 {main} thrown in /home/u1643084/public_html/conferences/lib/pkp/lib/vendor/symfony/http-foundation/Request.php on line 1743