magento2 problem with sessions – Magento Stack Exchange

I have problem with session_start()

AH01071: Got error 'PHP message: PHP Fatal error: Uncaught Exception: Warning: session_start(): Failed to decode session object. Session has been destroyed in /var/www/vhosts/my-domains.com/vendor/magento/framework/Session/SessionManager.php on line 191 in /var/www/vhosts/my-domains.com/vendor/magento/framework/App/ErrorHandler.php:61nStack trace:n#0 (internal function): Magento\Framework\App\ErrorHandler->handler(2, 'session_start()...', '/var/www/vhosts...', 191, Array)n#1 /var/www/vhosts/my-domains.com/vendor/magento/framework/Session/SessionManager.php(191): session_start()n#2 /var/www/vhosts/my-domains.com/generated/code/Magento/Backend/Model/Auth/Session/Interceptor.php(167): Magento\Framework\Session\SessionManager->start()n#3 /var/www/vhosts/my-domains.com/vendor/magento/framework/Session/SessionManager.php(127): Magento\Backend\Model\Auth\Session\Interceptor->start()n#4 /var/www/vhosts/my-domains.comn', referer: https://my-domains.com/setup/