Magento – Cannot gather stats! Warning!stat(): stat failed for /opt/bitnami/apps/magento/htdocs/pub/media/catalog/product/I/V/IVOC01_BLUE01_01_IMG1_12.jpg

You can just create Uninstall.php file inside setup folder .

namespace Vendor\Sorting\Setup {

    class Uninstall implements \Magento\Framework\Setup\UninstallInterface
    {    
        protected $eavSetupFactory;

        public function __construct(\Magento\Eav\Setup\EavSetupFactory $eavSetupFactory)
        {
            $this->eavSetupFactory = $eavSetupFactory;
        }

        public function uninstall(\Magento\Framework\Setup\SchemaSetupInterface $setup, \Magento\Framework\Setup\ModuleContextInterface $context)
        {
            $setup->startSetup();    
            $eavSetup = $this->eavSetupFactory->create();    
            $entityTypeId = 4; // value for eav_entity_type table, here catalog_product value is 4
            $eavSetup->removeAttribute($entityTypeId, 'sorting_attribute');    
            $setup->endSetup();    
        }
    }

}

Run command,

php bin/magento setup:upgrade

Remove var folder and clear cache.

GOOD GRIEF .... max_input_vars

I came across this years ago in Magento1 .... didn't even cross my mind for this issue.