1. Network problem: Check whether your network connection is normal, and try to reconnect the network or restart the router and other devices to ensure network stability.
2. Wrong account number or password: Check whether your account number and password are entered correctly. If you are not sure, you can try to find the password or contact the platform customer service for consultation.
3. System failure or maintenance: If the platform is undergoing system maintenance or fails, it will lead to the inability to log in. You can wait for the platform to fix the fault or perform maintenance before trying to log in.