An error has happened during application run. See exception log for details.
Fatal error: Uncaught Exception: Warning: session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/www/magento2/htdocs/var/session/) in /var/www/magento2/htdocs/vendor/magento/framework/Session/SessionManager.php on line 150 in /var/www/magento2/htdocs/vendor/magento/framework/App/ErrorHandler.php:61 Stack trace: #0 [internal function]: Magento\Framework\App\ErrorHandler->handler(2, 'session_write_c...', '/var/www/magent...', 150, Array) #1 /var/www/magento2/htdocs/vendor/magento/framework/Session/SessionManager.php(150): session_write_close() #2 [internal function]: Magento\Framework\Session\SessionManager->writeClose() #3 {main} thrown in /var/www/magento2/htdocs/vendor/magento/framework/App/ErrorHandler.php on line 61