The reason why Xiaoyun assistant failed to subscribe.

1. Order information error: the entered order information is incorrect, such as name, phone number, address and other information, or the order contains commodities that are not allowed.

2. Payment failure: If the customer's payment method fails or the customer's payment account information is wrong, the order may fail.

3. Insufficient inventory: If the commodity inventory is insufficient, even if the customer has successfully placed the order and completed the payment, the order may fail.

4. Technical problems: Technical problems may lead to the failure to submit the order, such as system failure and network connection problems.

5. Restrictive conditions: In some cases, orders may be restricted, for example, customers do not meet the minimum age requirement for shopping, or customers are prohibited from shopping under other conditions.