Exception: Warning: SessionHandler::read(): open(/var/lib/php/session/sess_56k6oj0qmd4m3af4s5i9efeqov, O_RDWR) failed: No space left on device (28) in /var/www/html/demotradersplatformcom/vendor/magento/framework/Session/SaveHandler/Native.php on line 22 in /var/www/html/demotradersplatformcom/vendor/magento/framework/App/ErrorHandler.php:61
Stack trace:
#0 [internal function]: Magento\Framework\App\ErrorHandler->handler(2, 'SessionHandler:...', '/var/www/html/d...', 22, Array)
#1 /var/www/html/demotradersplatformcom/vendor/magento/framework/Session/SaveHandler/Native.php(22): SessionHandler->read('56k6oj0qmd4m3af...')
#2 /var/www/html/demotradersplatformcom/vendor/magento/framework/Session/SaveHandler.php(80): Magento\Framework\Session\SaveHandler\Native->read('56k6oj0qmd4m3af...')
#3 [internal function]: Magento\Framework\Session\SaveHandler->read('56k6oj0qmd4m3af...')
#4 /var/www/html/demotradersplatformcom/vendor/magento/framework/Session/SessionManager.php(208): session_start()
#5 /var/www/html/demotradersplatformcom/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\Session\SessionManager->start()
#6 /var/www/html/demotradersplatformcom/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\Session\Generic\Interceptor->___callParent('start', Array)
#7 /var/www/html/demotradersplatformcom/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\Session\Generic\Interceptor->Magento\Framework\Interception\{closure}()
#8 /var/www/html/demotradersplatformcom/generated/code/Magento/Framework/Session/Generic/Interceptor.php(52): Magento\Framework\Session\Generic\Interceptor->___callPlugins('start', Array, Array)
#9 /var/www/html/demotradersplatformcom/vendor/magento/framework/Session/SessionManager.php(140): Magento\Framework\Session\Generic\Interceptor->start()
#10 /var/www/html/demotradersplatformcom/generated/code/Magento/Framework/Session/Generic/Interceptor.php(14): Magento\Framework\Session\SessionManager->__construct(Object(Magento\Framework\App\Request\Http), Object(Magento\Framework\Session\SidResolver\Proxy), Object(Magento\Framework\Session\Config), Object(Magento\Framework\Session\SaveHandler), Object(Magento\Framework\Session\Validator), Object(Magento\Framework\Session\Storage), Object(Magento\Framework\Stdlib\Cookie\PhpCookieManager), Object(Magento\Framework\Stdlib\Cookie\CookieMetadataFactory), Object(Magento\Framework\App\State\Interceptor), NULL)
#11 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(116): Magento\Framework\Session\Generic\Interceptor->__construct(Object(Magento\Framework\App\Request\Http), Object(Magento\Framework\Session\SidResolver\Proxy), Object(Magento\Framework\Session\Config), Object(Magento\Framework\Session\SaveHandler), Object(Magento\Framework\Session\Validator), Object(Magento\Framework\Session\Storage), Object(Magento\Framework\Stdlib\Cookie\PhpCookieManager), Object(Magento\Framework\Stdlib\Cookie\CookieMetadataFactory), Object(Magento\Framework\App\State\Interceptor), NULL)
#12 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(66): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject('Magento\\Framewo...', Array)
#13 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/ObjectManager.php(70): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magento\\Framewo...')
#14 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(160): Magento\Framework\ObjectManager\ObjectManager->get('Magento\\Framewo...')
#15 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(246): Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument(Array, 'Magento\\Framewo...', NULL, 'session', 'Magento\\Custome...')
#16 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(34): Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgumentsInRuntime('Magento\\Custome...', Array, Array)
#17 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(59): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->_resolveArguments('Magento\\Custome...', Array, Array)
#18 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/ObjectManager.php(70): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magento\\Custome...')
#19 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(160): Magento\Framework\ObjectManager\ObjectManager->get('Magento\\Custome...')
#20 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(246): Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument(Array, 'Magento\\Custome...', NULL, 'customerSession', 'Magento\\Checkou...')
#21 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(34): Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgumentsInRuntime('Magento\\Checkou...', Array, Array)
#22 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(59): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->_resolveArguments('Magento\\Checkou...', Array, Array)
#23 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/ObjectManager.php(70): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magento\\Checkou...')
#24 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(160): Magento\Framework\ObjectManager\ObjectManager->get('Magento\\Checkou...')
#25 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(246): Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument(Array, 'Magento\\Checkou...', NULL, 'checkoutSession', 'Magento\\Persist...')
#26 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(34): Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgumentsInRuntime('Magento\\Persist...', Array, Array)
#27 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(59): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->_resolveArguments('Magento\\Persist...', Array, Array)
#28 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/ObjectManager.php(70): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magento\\Persist...')
#29 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(160): Magento\Framework\ObjectManager\ObjectManager->get('Magento\\Persist...')
#30 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(246): Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument(Array, 'Magento\\Persist...', NULL, 'persistentSessi...', 'Magento\\Persist...')
#31 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(34): Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgumentsInRuntime('Magento\\Persist...', Array, Array)
#32 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(59): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->_resolveArguments('Magento\\Persist...', Array, Array)
#33 /var/www/html/demotradersplatformcom/vendor/magento/framework/ObjectManager/ObjectManager.php(70): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magento\\Persist...')
#34 /var/www/html/demotradersplatformcom/vendor/magento/framework/Interception/PluginList/PluginList.php(250): Magento\Framework\ObjectManager\ObjectManager->get('Magento\\Persist...')
#35 /var/www/html/demotradersplatformcom/vendor/magento/framework/Interception/Interceptor.php(119): Magento\Framework\Interception\PluginList\PluginList->getPlugin('Magento\\Framewo...', 'persistent_page...')
#36 /var/www/html/demotradersplatformcom/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Http\Context\Interceptor->Magento\Framework\Interception\{closure}()
#37 /var/www/html/demotradersplatformcom/generated/code/Magento/Framework/App/Http/Context/Interceptor.php(78): Magento\Framework\App\Http\Context\Interceptor->___callPlugins('getVaryString', Array, Array)
#38 /var/www/html/demotradersplatformcom/vendor/magento/framework/App/Response/Http.php(109): Magento\Framework\App\Http\Context\Interceptor->getVaryString()
#39 /var/www/html/demotradersplatformcom/generated/code/Magento/Framework/App/Response/Http/Interceptor.php(37): Magento\Framework\App\Response\Http->sendVary()
#40 /var/www/html/demotradersplatformcom/vendor/magento/module-page-cache/Model/App/Response/HttpPlugin.php(25): Magento\Framework\App\Response\Http\Interceptor->sendVary()
#41 /var/www/html/demotradersplatformcom/vendor/magento/framework/Interception/Interceptor.php(121): Magento\PageCache\Model\App\Response\HttpPlugin->beforeSendResponse(Object(Magento\Framework\App\Response\Http\Interceptor))
#42 /var/www/html/demotradersplatformcom/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Response\Http\Interceptor->Magento\Framework\Interception\{closure}()
#43 /var/www/html/demotradersplatformcom/generated/code/Magento/Framework/App/Response/Http/Interceptor.php(117): Magento\Framework\App\Response\Http\Interceptor->___callPlugins('sendResponse', Array, Array)
#44 /var/www/html/demotradersplatformcom/vendor/magento/framework/App/Http.php(206): Magento\Framework\App\Response\Http\Interceptor->sendResponse()
#45 /var/www/html/demotradersplatformcom/vendor/magento/framework/App/Http.php(177): Magento\Framework\App\Http->handleDeveloperMode(Object(Magento\Framework\App\Bootstrap), Object(Exception))
#46 /var/www/html/demotradersplatformcom/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\App\Http->catchException(Object(Magento\Framework\App\Bootstrap), Object(Exception))
#47 /var/www/html/demotradersplatformcom/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\App\Http\Interceptor->___callParent('catchException', Array)
#48 /var/www/html/demotradersplatformcom/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Http\Interceptor->Magento\Framework\Interception\{closure}(Object(Magento\Framework\App\Bootstrap), Object(Exception))
#49 /var/www/html/demotradersplatformcom/generated/code/Magento/Framework/App/Http/Interceptor.php(39): Magento\Framework\App\Http\Interceptor->___callPlugins('catchException', Array, Array)
#50 /var/www/html/demotradersplatformcom/vendor/magento/framework/App/Bootstrap.php(267): Magento\Framework\App\Http\Interceptor->catchException(Object(Magento\Framework\App\Bootstrap), Object(Exception))
#51 /var/www/html/demotradersplatformcom/index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http\Interceptor))
#52 {main}