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 (user). Please verify that the current setting of session.save_path is correct (/var/lib/php/session) in /var/project/magento_app/vendor/magento/framework/Session/SessionManager.php on line 139 in /var/project/magento_app/vendor/magento/framework/App/ErrorHandler.php:61 Stack trace: #0 [internal function]: Magento\Framework\App\ErrorHandler->handler(2, 'session_write_c...', '/var/project/ma...', 139, Array) #1 /var/project/magento_app/vendor/magento/framework/Session/SessionManager.php(139): session_write_close() #2 /var/project/magento_app/generated/code/Magento/Framework/Session/Generic/Interceptor.php(24): Magento\Framework\Session\SessionManager->writeClose() #3 [internal function]: Magento\Framework\Session\Generic\Interceptor->writeClose() #4 {main} thrown in /var/project/magento_app/vendor/magento/framework/App/ErrorHandler.php on line 61