Please make sure you are using a valid CSV file. I have just tested a random CSV file. After uploading the file, the system will ask you to select the header where is the employee ID and date/time is located.
So the structure of the CSV file is not an issue. Only 2 things that you need to keep in mind is-
1. Employee ID – it can be set on employee profile.
2. Date Time Format – 2016-01-03 08:58:19 (Y-M-D H:M:S). Note that the time has to be in 24-hour format.
If you are still having issues after following the above instructions, you can mail me the CSV file to [email protected] and I will make a template for you 🙂