Fatal error: Uncaught TypeError: Return value of LizardMedia\ProductAttachment\Controller\Download\Attachment::loadAttachmentById() must implement interface LizardMedia\ProductAttachment\Api\Data\AttachmentInterface or be null, none returned in /domains/pas-nutrition.co.uk/http/app/code/LizardMedia/ProductAttachment/Controller/Download/Attachment.php:113 Stack trace: #0 /domains/pas-nutrition.co.uk/http/app/code/LizardMedia/ProductAttachment/Controller/Download/Attachment.php(73): LizardMedia\ProductAttachment\Controller\Download\Attachment->loadAttachmentById(793) #1 /domains/pas-nutrition.co.uk/http/vendor/magento/framework/App/Action/Action.php(108): LizardMedia\ProductAttachment\Controller\Download\Attachment->execute() #2 /domains/pas-nutrition.co.uk/http/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\App\Action\Action->dispatch(Object(Magento\Framework\App\Request\Http)) #3 /domains/pas-nutrition.co.uk/http/vendor/magento/framework/Interception/Interceptor.php(138): LizardMedia\ProductA in /domains/pas-nutrition.co.uk/http/app/code/LizardMedia/ProductAttachment/Controller/Download/Attachment.php on line 113