On the premise that the mobile phone is normal and the network is fine, the temporary inability to log in should be the normal maintenance, update or upgrade of the application. In this case, there are relevant notices or notices detailing the time before app maintenance, so don't worry, just wait patiently.
Possible reasons for abnormal APP login:
1. When the network line fails, the data flow will be delayed.
2. The server is down, which causes the login page to fail to load or the login is abnormal.
3. The software version is too low, and the internal programs of the software cannot run user operations.
4. The software itself may contain sensitive content or have malicious behaviors that undermine the operation of the software.