Issue with loading iis logs using

I am trying to upload iis logs using and seeing this error

Fatal error: cannot automatically determine the log format using the first 100000 lines of log file.

Is there a specific file i need to upload for iis logs ? I am uploading file from c:\inetpub/logs/LogFIles

This is what we call IIS logs:

Is your log file different?

If so, what does it look like?