1. Network problem: If the network connection is unstable or too slow, the account information will be abnormal and cannot be recharged. At this time, you can try to reconnect to the network or change the network environment to recharge.
2. System problem: The system of the natural gas company may fail or be maintained, resulting in abnormal account information and unable to recharge. At this time, you can try to recharge later, or contact the customer service of the natural gas company for consultation.