I have upgraded the Magento version after that I have run cache clean, flush and permission command.
above cache-related commands are working good but
php bin/magento setup:upgrade command isn't working.
It gives this error:
[Exception] Notice: unserialize(): Error at offset 1977 of 2818 bytes in /var/www/html/magento2/vendor/magento/framework/Unserialize/Unserialize.php on line 21
Any help will be appreciated.