Fatal error: Uncaught Error: Call to undefined method Magento\GroupedProduct\Model\Product\Type\Grouped::getUsedProductIds() in /srv/users/serverpilot/apps/gipsy/public/app/design/frontend/Greenhonchos/styletag/Magento_Catalog/templates/product/view/addtocart.phtml:61 Stack trace: #0 /srv/users/serverpilot/apps/gipsy/public/vendor/magento/framework/View/TemplateEngine/Php.php(59): include() #1 /srv/users/serverpilot/apps/gipsy/public/vendor/magento/framework/View/Element/Template.php(270): Magento\Framework\View\TemplateEngine\Php->render(Object(Magento\Catalog\Block\Product\View\Interceptor), '/srv/users/serv...', Array) #2 /srv/users/serverpilot/apps/gipsy/public/generated/code/Magento/Catalog/Block/Product/View/Interceptor.php(544): Magento\Framework\View\Element\Template->fetchView('/srv/users/serv...') #3 /srv/users/serverpilot/apps/gipsy/public/vendor/magento/framework/View/Element/Template.php(300): Magento\Catalog\Block\Product\View\Interceptor->fetchView('/srv/users/serv...') #4 /srv/users/serverpilot/apps/gipsy/ in /srv/users/serverpilot/apps/gipsy/public/app/design/frontend/Greenhonchos/styletag/Magento_Catalog/templates/product/view/addtocart.phtml on line 61