To resolve this issue, complete the following steps:
- Open the original file in Microsoft Excel
- Select all cells that have content
- Copy the content ([CTRL +C] or right click and choose "copy")
- Open a brand new, blank Excel sheet
- Paste the content to the new sheet [(CTRL + P] or right click and choose "paste" in the upper left most cell.
- Save the file as a CSV file using a different name
- Re-upload the file to the imported list