Fatal error: Uncaught TypeError: Return value of MageLeven\ProductAttachment\Controller\Download\Attachment::execute() must implement interface Magento\Framework\Controller\ResultInterface, instance of Magento\Framework\App\Response\Http\Interceptor returned in /projects/woodenfloorsuk/woodenfloorsuk.com/www/app/code/MageLeven/ProductAttachment/Controller/Download/Attachment.php:98 Stack trace: #0 /projects/woodenfloorsuk/woodenfloorsuk.com/www/vendor/magento/framework/App/Action/Action.php(108): MageLeven\ProductAttachment\Controller\Download\Attachment->execute() #1 /projects/woodenfloorsuk/woodenfloorsuk.com/www/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\App\Action\Action->dispatch(Object(Magento\Framework\App\Request\Http)) #2 /projects/woodenfloorsuk/woodenfloorsuk.com/www/vendor/magento/framework/Interception/Interceptor.php(138): MageLeven\ProductAttachment\Controller\Download\Attachment\Interceptor->___callParent('dispatch', Array) #3 /projects/woodenfloorsuk/woodenfloorsuk.com/ww in /projects/woodenfloorsuk/woodenfloorsuk.com/www/app/code/MageLeven/ProductAttachment/Controller/Download/Attachment.php on line 98