there is a bug in the server.

sometimes the qq system is busy.

maybe you have too many words or symbols in your signature.

It is also possible that there is too much junk information on your computer and it is blocked. Clean it up and you will recover.

there are illegal words in the signature.

Solution:

Delete some redundant words or symbols and modify them again. The system will prompt that the modification is successful. If the system is busy, please wait a moment before modifying.

reinstall QQ, or delete the folder named after QQ in your QQ folder.

change it in the personal center of your QQ space, or change it in your mood, and then check the box below to synchronize to QQ signature.