Fatal error: Uncaught TypeError: Argument 2 passed to Interjar\ImprovedSeo\Model\AddCanonicalTag::execute() must be of the type string, null given, called in /domains/roseandgrey.co.uk/___http/releases/20191008130600/vendor/interjar/module-improved-seo/Plugin/CmsPage/Canonical.php on line 130 and defined in /domains/roseandgrey.co.uk/___http/releases/20191008130600/vendor/interjar/module-improved-seo/Model/AddCanonicalTag.php:37 Stack trace: #0 /domains/roseandgrey.co.uk/___http/releases/20191008130600/vendor/interjar/module-improved-seo/Plugin/CmsPage/Canonical.php(130): Interjar\ImprovedSeo\Model\AddCanonicalTag->execute(Object(Magento\Framework\View\Page\Config), NULL) #1 /domains/roseandgrey.co.uk/___http/releases/20191008130600/vendor/magento/framework/Interception/Interceptor.php(146): Interjar\ImprovedSeo\Plugin\CmsPage\Canonical->afterExecute(Object(Magento\Cms\Controller\Page\View\Interceptor), Object(Magento\Framework\Controller\Result\Forward\Interceptor)) #2 /domains/roseandgrey.co.uk/___http/releases/20191008 in /domains/roseandgrey.co.uk/___http/releases/20191008130600/vendor/interjar/module-improved-seo/Model/AddCanonicalTag.php on line 37