Cannot import a list

Cannot import a list. I got the following error message.

Domain is not correct:
https://www.vintazzclothing.com/wp-json/woocommerce_aliexpress_dropship/get_product_sku
Some possible causes are:
It’s blocked by a firewall plugin
REST API is disabled
Your site is not running on HTTPS
It’s blocked by your host’s firewall
You enter an incorrect domain(missing or redundant www. may also cause error)
Required plugin is not activated