White Screen in 3.2.1-2

White screen in OJS version OJS 3.2.1-2.

The log file found:

PHP Fatal error: Uncaught Error: Call to a member function getId() on null in /var/www/revistas/ojs/plugins/generic/customLocale/CustomLocalePlugin.inc.php:32\nStack trace:\n#0 /var/www/revistas/ojs/lib/pkp/classes/plugins/PluginRegistry.inc.php(69): CustomLocalePlugin->register()\n#1 /var/www/revistas/ojs/lib/pkp/classes/plugins/PluginRegistry.inc.php(144): PluginRegistry::register()\n#2 /var/www/revistas/ojs/lib/pkp/classes/core/Dispatcher.inc.php(132): PluginRegistry::loadCategory()\n#3 /var/www/revistas/ojs/lib/pkp/classes/core/PKPApplication.inc.php(279): Dispatcher->dispatch()\n#4 /var/www/revistas/ojs/index.php(68): PKPApplication->execute()\n#5 {main}\n thrown in /var/www/revistas/ojs/plugins/generic/customLocale/CustomLocalePlugin.inc.php on line 32

I appreciate if anyone can help.

Now the error looks like this

PHP Fatal error: Uncaught Exception: DB Error: Duplicate entry ‘’ for key ‘sessions_pkey’ Query: INSERT INTO sessions\n\t\t\t\t(session_id, ip_address, user_agent, created, last_used, remember, data, domain)\n\t\t\t\tVALUES\n\t\t\t\t(?, ?, ?, ?, ?, ?, ?, ?) in /var/www/revistas/ojs/lib/pkp/classes/db/DAO.inc.php:703\nStack trace:\n#0 /var/www/revistas/ojs/lib/pkp/classes/db/DAO.inc.php(231): DAO->handleError()\n#1 /var/www/revistas/ojs/lib/pkp/classes/session/SessionDAO.inc.php(78): DAO->update()\n#2 /var/www/revistas/ojs/lib/pkp/classes/session/SessionManager.inc.php(89): SessionDAO->insertObject()\n#3 /var/www/revistas/ojs/lib/pkp/classes/session/SessionManager.inc.php(129): SessionManager->__construct()\n#4 /var/www/revistas/ojs/lib/pkp/classes/security/Validation.inc.php(377): SessionManager::getManager()\n#5 /var/www/revistas/ojs/lib/pkp/classes/core/PKPPageRouter.inc.php(66): Validation::isLoggedIn()\n#6 /var/www/revistas/ojs/lib/pkp/classes/core/Dispatcher.inc.php(117): PKPPageRouter->isCacheable()\n#7 /var/www/revistas/ojs/lib/pkp/classes/co in /var/www/revistas/ojs/lib/pkp/classes/db/DAO.inc.php on line 703

Hello @luciano,

There have been some previous discussions on the “DB Error: Duplicate entry ‘’ for key ‘sessions_pkey’” in the thread below, along with possible solutions. Please read it and let us know if any of the suggestions there are successful for you.