InvalidArgumentException: Unable to unserialize value. in /var/www/html/vendor/magento/framework/Serialize/Serializer/Serialize.php:33
Stack trace:
#0 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(252): Magento\Framework\Serialize\Serializer\Serialize->unserialize('')
#1 /var/www/html/vendor/magento/framework/Cache/LockGuardedCacheLoader.php(84): Magento\Config\App\Config\Type\System->Magento\Config\App\Config\Type\{closure}()
#2 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(261): Magento\Framework\Cache\LockGuardedCacheLoader->lockedLoadData('SYSTEM_CONFIG', Object(Closure), Object(Closure), Object(Closure))
#3 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(195): Magento\Config\App\Config\Type\System->loadDefaultScopeData('default')
#4 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(169): Magento\Config\App\Config\Type\System->getWithParts('default/web/sec...')
#5 /var/www/html/vendor/magento/framework/App/Config.php(132): Magento\Config\App\Config\Type\System->get('default/web/sec...')
#6 /var/www/html/vendor/magento/framework/App/Config.php(80): Magento\Framework\App\Config->get('system', 'default/web/sec...')
#7 /var/www/html/vendor/magento/framework/App/Config.php(93): Magento\Framework\App\Config->getValue('web/secure/use_...', 'default', NULL)
#8 /var/www/html/vendor/magento/module-store/Model/HeaderProvider/Hsts.php(50): Magento\Framework\App\Config->isSetFlag('web/secure/use_...')
#9 /var/www/html/vendor/magento/framework/App/Response/HeaderManager.php(42): Magento\Store\Model\HeaderProvider\Hsts->canApply()
#10 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(121): Magento\Framework\App\Response\HeaderManager->beforeSendResponse(Object(Magento\Framework\App\Response\Http\Interceptor))
#11 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Response\Http\Interceptor->Magento\Framework\Interception\{closure}()
#12 /var/www/html/generated/code/Magento/Framework/App/Response/Http/Interceptor.php(117): Magento\Framework\App\Response\Http\Interceptor->___callPlugins('sendResponse', Array, Array)
#13 /var/www/html/vendor/magento/framework/App/ExceptionHandler.php(103): Magento\Framework\App\Response\Http\Interceptor->sendResponse()
#14 /var/www/html/vendor/magento/framework/App/ExceptionHandler.php(70): Magento\Framework\App\ExceptionHandler->handleDeveloperMode(Object(Magento\Framework\App\Bootstrap), Object(InvalidArgumentException), Object(Magento\Framework\App\Response\Http\Interceptor))
#15 /var/www/html/vendor/magento/framework/App/Http.php(156): Magento\Framework\App\ExceptionHandler->handle(Object(Magento\Framework\App\Bootstrap), Object(InvalidArgumentException), Object(Magento\Framework\App\Response\Http\Interceptor), Object(Magento\Framework\App\Request\Http))
#16 /var/www/html/vendor/magento/framework/App/Bootstrap.php(267): Magento\Framework\App\Http->catchException(Object(Magento\Framework\App\Bootstrap), Object(InvalidArgumentException))
#17 /var/www/html/index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http))
#18 {main}