Can't import social_bot well

[20chase]

Hi developers,

After I compiled the repo successfully, I tried to run the test script test_simple_navigation.py.

However, the script didn't work. Some error information could be found below

[Msg] Waiting for master.
[Msg] Connected to gazebo master @ http://127.0.0.1:11345
[Msg] Publicized address: 192.168.10.20
[Err] [LogRecord.cc:157] LogRecord has not been initialized.
[Wrn] [ModelDatabase.cc:340] Getting models from[http://models.gazebosim.org/]. This may take a few seconds.

Some suggestions and ideas will be appreciated.

Thank you.