Your CSV import does not start and displays the following message:
This means that either your CSV file does include columns with the same name or it includes additional empty columns, displayed in the mapping as below:
You will need to edit the CSV file and remove the last columns before reloading it in the Import window.
These additional columns are not visible in your spreadsheet program (Excel/ OpenOffice).
However, if you edit the CSV file in Notepad++ for PC only (free download) these columns will be displayed as semi-colons.