Fatal error: Uncaught TypeError: Argument 1 passed to Magento\Catalog\Model\ProductRepository::prepareSku() must be of the type string, null given, called in /domains/templespa.com/___deploy/2019_05_16-09_59_58/vendor/magento/module-catalog/Model/ProductRepository.php on line 675 and defined in /domains/templespa.com/___deploy/2019_05_16-09_59_58/vendor/magento/module-catalog/Model/ProductRepository.php:685 Stack trace: #0 /domains/templespa.com/___deploy/2019_05_16-09_59_58/vendor/magento/module-catalog/Model/ProductRepository.php(675): Magento\Catalog\Model\ProductRepository->prepareSku(NULL) #1 /domains/templespa.com/___deploy/2019_05_16-09_59_58/vendor/magento/module-catalog/Model/ProductRepository.php(308): Magento\Catalog\Model\ProductRepository->saveProductInLocalCache(Object(Magento\Catalog\Model\Product\Interceptor), '45a805ed02e69df...') #2 /domains/templespa.com/___deploy/2019_05_16-09_59_58/vendor/magento/module-catalog/Model/ProductRepository.php(273): Magento\Catalog\Model\ProductRepository->cacheProduct('45 in /domains/templespa.com/___deploy/2019_05_16-09_59_58/vendor/magento/module-catalog/Model/ProductRepository.php on line 685