Good morning ramana_mohan ,
In accordance with the log file, the connection opened by the GUI client is getting reset for some reason. Thus, the uploading attempt failed. Try to follow the action items below:
1. Ensure that the TFS server is acceptable from your PC. You can try to connect to the same TFS server or collection via a browser or Visual Studio interface.
2. The TFS server can reset the connection due to an issue with the authentication method. Try to enable the "alternate authentication credentials" in your TFS account and re-use the alternative password instead of the regular one in the Collaborator client configuration.
I hope this helps.
