Error: Call to a member function addLinkRel() on bool in /home/testing/promotoner/app/code/Impro/Productpage/Observer/LayoutLoadBeforeObserver.php:47
Stack trace:
#0 /home/testing/promotoner/vendor/magento/framework/Event/Invoker/InvokerDefault.php(88): Impro\Productpage\Observer\LayoutLoadBeforeObserver->execute()
#1 /home/testing/promotoner/vendor/magento/framework/Event/Invoker/InvokerDefault.php(74): Magento\Framework\Event\Invoker\InvokerDefault->_callObserverMethod()
#2 /home/testing/promotoner/vendor/magento/framework/Event/Manager.php(66): Magento\Framework\Event\Invoker\InvokerDefault->dispatch()
#3 /home/testing/promotoner/generated/code/Magento/Framework/Event/Manager/Proxy.php(95): Magento\Framework\Event\Manager->dispatch()
#4 /home/testing/promotoner/vendor/magento/framework/View/Layout/Builder.php(81): Magento\Framework\Event\Manager\Proxy->dispatch()
#5 /home/testing/promotoner/vendor/magento/framework/View/Layout/Builder.php(63): Magento\Framework\View\Layout\Builder->loadLayoutUpdates()
#6 /home/testing/promotoner/vendor/magento/framework/View/Page/Config.php(224): Magento\Framework\View\Layout\Builder->build()
#7 /home/testing/promotoner/vendor/magento/framework/View/Page/Config.php(237): Magento\Framework\View\Page\Config->build()
#8 /home/testing/promotoner/vendor/magento/framework/View/Result/Page.php(242): Magento\Framework\View\Page\Config->publicBuild()
#9 /home/testing/promotoner/vendor/magento/framework/View/Result/Layout.php(171): Magento\Framework\View\Result\Page->render()
#10 /home/testing/promotoner/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\View\Result\Layout->renderResult()
#11 /home/testing/promotoner/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\View\Result\Page\Interceptor->___callParent()
#12 /home/testing/promotoner/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\View\Result\Page\Interceptor->Magento\Framework\Interception\{closure}()
#13 /home/testing/promotoner/generated/code/Magento/Framework/View/Result/Page/Interceptor.php(23): Magento\Framework\View\Result\Page\Interceptor->___callPlugins()
#14 /home/testing/promotoner/vendor/magento/framework/App/Http.php(120): Magento\Framework\View\Result\Page\Interceptor->renderResult()
#15 /home/testing/promotoner/vendor/magento/framework/App/Bootstrap.php(263): Magento\Framework\App\Http->launch()
#16 /home/testing/promotoner/pub/index.php(52): Magento\Framework\App\Bootstrap->run()
#17 {main}