Fatal error: Uncaught Error: Call to undefined method Rokanthemes\Brand\Model\ResourceModel\Brand\Collection::addAttributeToSort() in /var/www/vhosts/weedfabricdirect.co.uk/htdocs/vendor/magento/module-catalog/Block/Product/ProductList/Toolbar.php:234 Stack trace: #0 /var/www/vhosts/weedfabricdirect.co.uk/htdocs/app/code/Rokanthemes/Brand/Block/Group/View.php(208): Magento\Catalog\Block\Product\ProductList\Toolbar->setCollection(Object(Rokanthemes\Brand\Model\ResourceModel\Brand\Collection)) #1 /var/www/vhosts/weedfabricdirect.co.uk/htdocs/vendor/magento/framework/View/Element/AbstractBlock.php(1093): Rokanthemes\Brand\Block\Group\View->_beforeToHtml() #2 /var/www/vhosts/weedfabricdirect.co.uk/htdocs/vendor/magento/framework/View/Element/AbstractBlock.php(1098): Magento\Framework\View\Element\AbstractBlock->Magento\Framework\View\Element\{closure}() #3 /var/www/vhosts/weedfabricdirect.co.uk/htdocs/vendor/magento/framework/View/Element/AbstractBlock.php(671): Magento\Framework\View\Element\AbstractBlock->_loadCache() #4 /v in /var/www/vhosts/weedfabricdirect.co.uk/htdocs/vendor/magento/module-catalog/Block/Product/ProductList/Toolbar.php on line 234