Fatal error: Uncaught TypeError: ucfirst(): Argument #1 ($string) must be of type string, null given in /mnt/WWW/visaemdebate/lib/pkp/classes/i18n/LocaleMetadata.php:190
Stack trace:
#0 /mnt/WWW/visaemdebate/lib/pkp/classes/i18n/LocaleMetadata.php(190): ucfirst()
#1 /mnt/WWW/visaemdebate/plugins/generic/defaultTranslation/DefaultTranslationPlugin.php(123): PKP\i18n\LocaleMetadata->getScript()
#2 [internal function]: APP\plugins\generic\defaultTranslation\DefaultTranslationPlugin->APP\plugins\generic\defaultTranslation\{closure}()
#3 /mnt/WWW/visaemdebate/plugins/generic/defaultTranslation/DefaultTranslationPlugin.php(120): uasort()
#4 /mnt/WWW/visaemdebate/plugins/generic/defaultTranslation/DefaultTranslationPlugin.php(89): APP\plugins\generic\defaultTranslation\DefaultTranslationPlugin->getSuitableLocales()
#5 /mnt/WWW/visaemdebate/plugins/generic/defaultTranslation/DefaultTranslationPlugin.php(54): APP\plugins\generic\defaultTranslation\DefaultTranslationPlugin->translate()
#6 [internal function]: APP\plugins\generic\defaultTranslation\DefaultTranslationPlugin->APP\plugins\generic\defaultTranslation\{closure}()
#7 /mnt/WWW/visaemdebate/lib/pkp/classes/plugins/Hook.php(139): call_user_func_array()
#8 /mnt/WWW/visaemdebate/lib/pkp/classes/plugins/Hook.php(113): PKP\plugins\Hook::run()
#9 /mnt/WWW/visaemdebate/lib/pkp/classes/i18n/Locale.php(422): PKP\plugins\Hook::call()
#10 /mnt/WWW/visaemdebate/lib/pkp/classes/i18n/Locale.php(115): PKP\i18n\Locale->translate()
#11 /mnt/WWW/visaemdebate/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Foundation/helpers.php(954): PKP\i18n\Locale->choice()
#12 /mnt/WWW/visaemdebate/lib/pkp/includes/functions.php(359): trans_choice()
#13 /mnt/WWW/visaemdebate/lib/pkp/classes/template/PKPTemplateManager.php(1542): __p()
#14 /mnt/WWW/visaemdebate/cache/t_compile/f09822d526ba2b77dee1b6fa34cba9dcc80abebc^756a7119cb48731a8fd45c250b45f4bcca2d6b01_0.app.frontendpagessearch.tpl.php(153): PKP\template\PKPTemplateManager->smartyTranslate()
#15 /mnt/WWW/visaemdebate/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_resource_base.php(123): content_662bcb65cc1376_65786181()
#16 /mnt/WWW/visaemdebate/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_compiled.php(114): Smarty_Template_Resource_Base->getRenderedTemplateCode()
#17 /mnt/WWW/visaemdebate/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_internal_template.php(217): Smarty_Template_Compiled->render()
#18 /mnt/WWW/visaemdebate/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatebase.php(238): Smarty_Internal_Template->render()
#19 /mnt/WWW/visaemdebate/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatebase.php(134): Smarty_Internal_TemplateBase->_execute()
#20 /mnt/WWW/visaemdebate/lib/pkp/classes/template/PKPTemplateManager.php(1368): Smarty_Internal_TemplateBase->display()
#21 /mnt/WWW/visaemdebate/pages/search/SearchHandler.php(187): PKP\template\PKPTemplateManager->display()
#22 [internal function]: APP\pages\search\SearchHandler->search()
#23 /mnt/WWW/visaemdebate/lib/pkp/classes/core/PKPRouter.php(334): call_user_func()
#24 /mnt/WWW/visaemdebate/lib/pkp/classes/core/PKPPageRouter.php(277): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest()
#25 /mnt/WWW/visaemdebate/lib/pkp/classes/core/Dispatcher.php(165): PKP\core\PKPPageRouter->route()
#26 /mnt/WWW/visaemdebate/lib/pkp/classes/core/PKPApplication.php(388): PKP\core\Dispatcher->dispatch()
#27 /mnt/WWW/visaemdebate/index.php(68): PKP\core\PKPApplication->execute()
#28 {main}
thrown in /mnt/WWW/visaemdebate/lib/pkp/classes/i18n/LocaleMetadata.php on line 190