Fatal error: Uncaught Exception: Warning: SessionHandler::write(): write failed: No space left on device (28) in /var/www/magento/vendor/magento/framework/Session/SaveHandler.php on line 138 in /var/www/magento/vendor/magento/framework/App/ErrorHandler.php:61 Stack trace: #0 [internal function]: Magento\Framework\App\ErrorHandler->handler(2, 'SessionHandler:...', '/var/www/magent...', 138, Array) #1 /var/www/magento/vendor/magento/framework/Session/SaveHandler.php(138): SessionHandler->write('7hc9b7nv5cj57s5...', '_session_valida...') #2 /var/www/magento/vendor/magento/framework/Session/SaveHandler.php(95): Magento\Framework\Session\SaveHandler->callSafely('write', '7hc9b7nv5cj57s5...', '_session_valida...') #3 [internal function]: Magento\Framework\Session\SaveHandler->write('7hc9b7nv5cj57s5...', '_session_valida...') #4 /var/www/magento/vendor/magento/framework/Session/SessionManager.php(150): session_write_close() #5 [internal function]: Magento\Framework\Session\SessionManager->writeClose() #6 {main} thrown in /var/www/magento/vendor/magento/framework/App/ErrorHandler.php on line 61