There is an error appears when I visit the back-end

Magento ver. 2.3.5-p1

When I access the back-end, sometimes there is an error as following.

Does someone has the same issue and were able to fix it?

Any ideas how to fix it?

I am happy for any ideas!

Thanks for helping.

There has been an error processing your request
Exception printing is disabled by default for security reasons.

Error log record number: efdd144c177f76a85eb59cb370ff0e99ff425aa122932e0604b8023729cae91a

And the file "efdd144c177f76a85eb59cb370ff0e99ff425aa122932e0604b8023729cae91a" I have this


{"0":"Warning: SessionHandler::read(): open(/var/lib/session/sess_s28439ejde6euu7bchsnh1lrv6, O_RDWR) failed: No space left on device (28) in /var/www/html/vendor/magento/framework/Session/SaveHandler/Native.php on line 22","1":"#1 SessionHandler->read() called at [vendor/magento/framework/Session/SaveHandler/Native.php:22]n#2 Magento\Framework\Session\SaveHandler\Native->read() called at [vendor/magento/framework/Session/SaveHandler.php:138]n#3 Magento\Framework\Session\SaveHandler->callSafely() called at [vendor/magento/framework/Session/SaveHandler.php:83]n#4 Magento\Framework\Session\SaveHandler->read()n#5 session_start() called at [vendor/magento/framework/Session/SessionManager.php:204]n#6 Magento\Framework\Session\SessionManager->start() called at [generated/code/Magento/Backend/Model/Auth/Session/Interceptor.php:37]n#7 Magento\Backend\Model\Auth\Session\Interceptor->start() called at [vendor/magento/framework/Session/SessionManager.php:141]n#8 Magento\Framework\Session\SessionManager->__construct() called at [vendor/magento/module-backend/Model/Auth/Session.php:101]n#9 Magento\Backend\Model\Auth\Session->__construct() called at [generated/code/Magento/Backend/Model/Auth/Session/Interceptor.php:14]n#10 Magento\Backend\Model\Auth\Session\Interceptor->__construct() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:121]n#11 Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:66]n#12 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create() called at [vendor/magento/framework/ObjectManager/ObjectManager.php:70]n#13 Magento\Framework\ObjectManager\ObjectManager->get() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:167]n#14 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:273]n#15 Magento\Framework\ObjectManager\Factory\AbstractFactory->getResolvedArgument() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:236]n#16 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgumentsInRuntime() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:34]n#17 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->_resolveArguments() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:59]n#18 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create() called at [vendor/magento/framework/ObjectManager/ObjectManager.php:70]n#19 Magento\Framework\ObjectManager\ObjectManager->get() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:167]n#20 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:273]n#21 Magento\Framework\ObjectManager\Factory\AbstractFactory->getResolvedArgument() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:236]n#22 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgumentsInRuntime() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:34]n#23 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->_resolveArguments() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:59]n#24 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create() called at [vendor/magento/framework/ObjectManager/ObjectManager.php:70]n#25 Magento\Framework\ObjectManager\ObjectManager->get() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:203]n#26 Magento\Framework\ObjectManager\Factory\AbstractFactory->parseArray() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:179]n#27 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:273]n#28 Magento\Framework\ObjectManager\Factory\AbstractFactory->getResolvedArgument() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:236]n#29 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgumentsInRuntime() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:34]n#30 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->_resolveArguments() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:59]n#31 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create() called at [vendor/magento/framework/ObjectManager/ObjectManager.php:70]n#32 Magento\Framework\ObjectManager\ObjectManager->get() called at [vendor/magento/framework/App/FrontController.php:71]n#33 Magento\Framework\App\FrontController->__construct() called at [generated/code/Magento/Framework/App/FrontController/Interceptor.php:14]n#34 Magento\Framework\App\FrontController\Interceptor->__construct() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:121]n#35 Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:66]n#36 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create() called at [vendor/magento/framework/ObjectManager/ObjectManager.php:70]n#37 Magento\Framework\ObjectManager\ObjectManager->get() called at [vendor/magento/framework/App/Http.php:115]n#38 Magento\Framework\App\Http->launch() called at [vendor/magento/framework/App/Bootstrap.php:261]n#39 Magento\Framework\App\Bootstrap->run() called at [pub/index.php:40]n","url":"/admin_mqimtc/","script_name":"/index.php","report_id":"efdd144c177f76a85eb59cb370ff0e99ff425aa122932e0604b8023729cae91a"}