Unit testing failed in module 3

i have successfully shared the file between client and server(the upload.txt and download.txt file). but the unit testing is failed in confirm_client_server_communication.
Screenshot from 2020-02-15 14-12-53

read the unitTesting.log file attached with your assessment report and try to find out error.

Use this you will find out

I think you haven’t completed milestone 2 properly. You might have missed some specified task.