Solution:

1. Check whether the positioning function is turned on.

2. Check whether the nearby people are authorized.

3. Some netizens said that it is related to personalized signatures. Try deleting or changing the personalized signatures.

4. Exit, restart, and try logging in again.

5. If you use this function frequently in a short period of time, you generally need not to use this function within a week, and try again after a week.