1 exception(s): Exception #0 (Magento\Framework\Config\Dom\ValidationException): Element 'block', attribute 'class': [facet 'pattern'] The value '\Magento\Framework\View\Element\Text\ListText' is not accepted by the pattern '[A-Z][_a-zA-Z\d]*(\\[A-Z][_a-zA-Z\d]*)*'. Line: 1177 Exception #0 (Magento\Framework\Config\Dom\ValidationException): Element 'block', attribute 'class': [facet 'pattern'] The value '\Magento\Framework\View\Element\Text\ListText' is not accepted by the pattern '[A-Z][_a-zA-Z\d]*(\\[A-Z][_a-zA-Z\d]*)*'. Line: 1177
#1 Magento\Framework\Config\Dom->__construct('createObject('Magento\Framewor...', array('create('Magento\Framewor...', array('xml' => ' '/var/www/clients...', 'validationState' => &Magento\Framework\App\Arguments\ValidationState#0000000072b557d20000000039bd7354#)) called at [vendor/magento/framework/ObjectManager/ObjectManager.php:56]
#4 Magento\Framework\ObjectManager\ObjectManager->create('Magento\Framewor...', array('xml' => ' '/var/www/clients...', 'validationState' => &Magento\Framework\App\Arguments\ValidationState#0000000072b557d20000000039bd7354#)) called at [vendor/magento/framework/Config/DomFactory.php:43]
#5 Magento\Framework\Config\DomFactory->createDom(array('xml' => ' '/var/www/clients...', 'validationState' => &Magento\Framework\App\Arguments\ValidationState#0000000072b557d20000000039bd7354#)) called at [vendor/magento/framework/View/Model/Layout/Update/Validator.php:141]
#6 Magento\Framework\View\Model\Layout\Update\Validator->isValid('_validateMergedLayout('LAYOUT_frontend_...', '\n   load(array()) called at [generated/code/Magento/Framework/View/Model/Layout/Merge/Interceptor.php:206]
#9 Magento\Framework\View\Model\Layout\Merge\Interceptor->load() called at [vendor/magento/framework/View/Layout/Builder.php:86]
#10 Magento\Framework\View\Layout\Builder->loadLayoutUpdates() called at [vendor/magento/framework/View/Layout/Builder.php:63]
#11 Magento\Framework\View\Layout\Builder->build() called at [vendor/magento/framework/View/Page/Config.php:224]
#12 Magento\Framework\View\Page\Config->build() called at [vendor/magento/framework/View/Page/Config.php:587]
#13 Magento\Framework\View\Page\Config->getElementAttribute('body', 'class') called at [vendor/magento/framework/View/Page/Config.php:545]
#14 Magento\Framework\View\Page\Config->addBodyClass('layout-fullwidth') called at [app/code/Smartwave/Porto/Plugin/UpdateBodyClass.php:30]
#15 Smartwave\Porto\Plugin\UpdateBodyClass->beforeRenderResult(&Magento\Framework\View\Result\Page\Interceptor#0000000072b552ad0000000039bd7354#, &Magento\Framework\App\Response\Http\Interceptor#0000000072b5562e0000000039bd7354#) called at [vendor/magento/framework/Interception/Interceptor.php:121]
#16 Magento\Framework\View\Result\Page\Interceptor->Magento\Framework\Interception\{closure}(&Magento\Framework\App\Response\Http\Interceptor#0000000072b5562e0000000039bd7354#) called at [vendor/magento/framework/Interception/Interceptor.php:153]
#17 Magento\Framework\View\Result\Page\Interceptor->___callPlugins('renderResult', array(&Magento\Framework\App\Response\Http\Interceptor#0000000072b5562e0000000039bd7354#), array(array('result-messages', 'result-builtin-c...', 'result-varnish-c...'), array('updateBodyClass'))) called at [generated/code/Magento/Framework/View/Result/Page/Interceptor.php:130]
#18 Magento\Framework\View\Result\Page\Interceptor->renderResult(&Magento\Framework\App\Response\Http\Interceptor#0000000072b5562e0000000039bd7354#) called at [vendor/magento/framework/App/Http.php:120]
#19 Magento\Framework\App\Http->launch() called at [generated/code/Magento/Framework/App/Http/Interceptor.php:24]
#20 Magento\Framework\App\Http\Interceptor->launch() called at [vendor/magento/framework/App/Bootstrap.php:261]
#21 Magento\Framework\App\Bootstrap->run(&Magento\Framework\App\Http\Interceptor#0000000072b556350000000039bd7354#) called at [pub/index.php:40]