Hi @yoshiki3 , I think this error is most likely caused because some lines in the csv file have more data elements on them than other lines.
This can sometimes occur when data contains carriage return characters for example.
As a test can you try ticking the “Support Short Data Rows” option (in the lower half of your screenshot) and trying again to see if that changes anything…
If it then loads your data, hopefully you can scroll down it to see where the problem data is occurring in the file, and fix it.