Cannot retrieve data.Service unavailable. Please try again later

I can’t sync the products from Aliexpress with my store or import new products, it’s as if the extension isn’t working. I’m getting the error ‘Service unavailable. Please try again later.’ I’ve tried installing the latest versions of both the plugin and the extension, I’ve tested changing the language in Aliexpress and even the currency. It used to work, but ever since I renewed the update key after it expired, it has stopped working. What could be the issue?