While adding products to my magento2 store I get this problem:

This is my var report file:

a:4:{i:0;s:37:"Object DOMDocument should be created.";i:1;s:5978:"#0 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/View/Element/UiComponent/Config/Reader.php(95):Magento\Framework\View\Element\UiComponent\Config\DomMerger->getDom() #1 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/module-ui/Model/Manager.php(258): Magento\Framework\View\Element\UiComponent\Config\Reader->read() #2 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/module-ui/Model/Manager.php(166): Magento\Ui\Model\Manager->prepare('review_listing') #3 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/View/Element/UiComponentFactory.php(144): Magento\Ui\Model\Manager->prepareData('review_listing') #4 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/module-ui/Controller/Adminhtml/Index/Render.php(30): Magento\Framework\View\Element\UiComponentFactory->create('review_listing') #5 /home/lagjjail/public_html/kushtrim.net/myphones/var/generation/Magento/Ui/Controller/Adminhtml/Index/Render/Interceptor.php(24): Magento\Ui\Controller\Adminhtml\Index\Render->execute() #6 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/App/Action/Action.php(102): Magento\Ui\Controller\Adminhtml\Index\Render\Interceptor->execute() #7 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/module-backend/App/AbstractAction.php(226): Magento\Framework\App\Action\Action->dispatch(Object(Magento\Framework\App\Request\Http)) #8 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/Interception/Interceptor.php(74): Magento\Backend\App\AbstractAction->dispatch(Object(Magento\Framework\App\Request\Http)) #9 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/Interception/Chain/Chain.php(70): Magento\Ui\Controller\Adminhtml\Index\Render\Interceptor->___callParent('dispatch', Array) #10 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/Interception/Chain/Chain.php(63): Magento\Framework\Interception\Chain\Chain->invokeNext('Magento\\Ui\\Cont...', 'dispatch', Object(Magento\Ui\Controller\Adminhtml\Index\Render\Interceptor), Array, 'adminAuthentica...') #11 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/module-backend/App/Action/Plugin/Authentication.php(143): Magento\Framework\Interception\Chain\Chain->Magento\Framework\Interception\Chain\{closure}(Object(Magento\Framework\App\Request\Http)) #12 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/Interception/Chain/Chain.php(67): Magento\Backend\App\Action\Plugin\Authentication->aroundDispatch(Object(Magento\Ui\Controller\Adminhtml\Index\Render\Interceptor), Object(Closure), Object(Magento\Framework\App\Request\Http)) #13 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\Interception\Chain\Chain->invokeNext('Magento\\Ui\\Cont...', 'dispatch', Object(Magento\Ui\Controller\Adminhtml\Index\Render\Interceptor), Array, 'adminMassaction...') #14 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/module-backend/App/Action/Plugin/MassactionKey.php(33): Magento\Ui\Controller\Adminhtml\Index\Render\Interceptor->Magento\Framework\Interception\{closure}(Object(Magento\Framework\App\Request\Http)) #15 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/Interception/Interceptor.php(142): Magento\Backend\App\Action\Plugin\MassactionKey->aroundDispatch(Object(Magento\Ui\Controller\Adminhtml\Index\Render\Interceptor), Object(Closure), Object(Magento\Framework\App\Request\Http)) #16 /home/lagjjail/public_html/kushtrim.net/myphones/var/generation/Magento/Ui/Controller/Adminhtml/Index/Render/Interceptor.php(52): Magento\Ui\Controller\Adminhtml\Index\Render\Interceptor->___callPlugins('dispatch', Array, Array) #17 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/App/FrontController.php(55): Magento\Ui\Controller\Adminhtml\Index\Render\Interceptor->dispatch(Object(Magento\Framework\App\Request\Http)) #18 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/Interception/Interceptor.php(74): Magento\Framework\App\FrontController->dispatch(Object(Magento\Framework\App\Request\Http)) #19 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/Interception/Chain/Chain.php(70): Magento\Framework\App\FrontController\Interceptor->___callParent('dispatch', Array) #20 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\Interception\Chain\Chain->invokeNext('Magento\\Framewo...', 'dispatch', Object(Magento\Framework\App\FrontController\Interceptor), Array, 'install') #21 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/Module/Plugin/DbStatusValidator.php(69): Magento\Framework\App\FrontController\Interceptor->Magento\Framework\Interception\{closure}(Object(Magento\Framework\App\Request\Http)) #22 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/Interception/Interceptor.php(142): Magento\Framework\Module\Plugin\DbStatusValidator->aroundDispatch(Object(Magento\Framework\App\FrontController\Interceptor), Object(Closure), Object(Magento\Framework\App\Request\Http)) #23 /home/lagjjail/public_html/kushtrim.net/myphones/var/generation/Magento/Framework/App/FrontController/Interceptor.php(26): Magento\Framework\App\FrontController\Interceptor->___callPlugins('dispatch', Array, Array) #24 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/App/Http.php(135): Magento\Framework\App\FrontController\Interceptor->dispatch(Object(Magento\Framework\App\Request\Http)) #25 /home/lagjjail/public_html/kushtrim.net/myphones/vendor/magento/framework/App/Bootstrap.php(258): Magento\Framework\App\Http->launch() #26 /home/lagjjail/public_html/kushtrim.net/myphones/index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http)) #27 {main}";s:3:"url";s:139:"/myphones/admin/mui/index/render/key/da73d8fc562ce967b9d8f128927dce12e2d03178a186aa6129e39cb70c2b23e9/?namespace=review_listing&isAjax=true";s:11:"script_name";s:19:"/myphones/index.php";} 

This courses that my can add products to the cart and checkout but the checkout process can't proceed so you can't add addresses and go further.

Thanks.