Fatal error: Uncaught TypeError: Locale::setDefault(): Argument #1 ($locale) must be of type string, null given in /home/mine/web/ojs.mine-cloud.my.id/public_html/lib/pkp/classes/i18n/Locale.php:163 Stack trace: #0 /home/mine/web/ojs.mine-cloud.my.id/public_html/lib/pkp/classes/i18n/Locale.php(163): Locale::setDefault(NULL) #1 /home/mine/web/ojs.mine-cloud.my.id/public_html/lib/pkp/classes/i18n/Locale.php(143): PKP\i18n\Locale->setLocale('id') #2 /home/mine/web/ojs.mine-cloud.my.id/public_html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Support/Facades/Facade.php(363): PKP\i18n\Locale->getLocale() #3 /home/mine/web/ojs.mine-cloud.my.id/public_html/lib/pkp/classes/core/PKPPageRouter.php(147): Illuminate\Support\Facades\Facade::__callStatic('getLocale', Array) #4 /home/mine/web/ojs.mine-cloud.my.id/public_html/lib/pkp/classes/core/Dispatcher.php(259): PKP\core\PKPPageRouter->getCacheFilename(Object(APP\core\Request)) #5 /home/mine/web/ojs.mine-cloud.my.id/public_html/lib/pkp/classes/core/Dispatcher.php(134): PKP\core\Dispatcher->_displayCached(Object(APP\core\PageRouter), Object(APP\core\Request)) #6 /home/mine/web/ojs.mine-cloud.my.id/public_html/lib/pkp/classes/core/PKPApplication.php(429): PKP\core\Dispatcher->dispatch(Object(APP\core\Request)) #7 /home/mine/web/ojs.mine-cloud.my.id/public_html/index.php(21): PKP\core\PKPApplication->execute() #8 {main} thrown in /home/mine/web/ojs.mine-cloud.my.id/public_html/lib/pkp/classes/i18n/Locale.php on line 163