The error, “There was an error while creating this base view: Column names could not be generated” occurs when you try to access the Delimited files directly from "http://192.168.100.100/files/df/" or "http://data-server/files/df/".
According to the lab description, you would need to download the files from data server and save it in your local folder. Then perform the steps provided in the lab pointing to the log files by choosing Data route as Local. This would allow you the create the base views successfully.
For more information, please refer to the steps provided in the lab description.
Hope this helps!