This message appears if the current product or its variant is no longer available from the supplier.
To fix this issue:
- Manually add a similar product from another seller (to the AliExpress shopping cart)
- Or select another product variation that is currently in stock.
- After that press the “Continue” button in the Order Fulfillment popup.
The chrome extension will automatically save the order ID of the selected product in your current WooCommerce order when it place your order.