It may be caused by poor network, so it is recommended to try again later. Or typesetting. It may also exceed the maximum number of personalized signatures. OO system maintenance, some functions can not be used.

The solution is as follows:

1. Log in your correct QQ account and password with your mobile phone, and you can log in successfully.

2. after logging in successfully, we click "settings" to find the option function of "personalized signature".

3. After clicking Select, we can modify what we need to fill in. After filling in successfully, select "OK" in the upper right corner.