If you receive this error when trying to import a file, search for a comma in your file - this is usually the problem when you get this error. The file type is CSV (Comma Separated Value) so when an extra comma is in the file as part of the data, the import process doesn't like it and gives you the error above.

How to Fix it

A good way to remove all commas is to us the remove all option in excel. 
Use CTRL + F - This will bring up the Find and Replace Dialogue Box in Excel

Go to the Replace Tab
Put a Comma in the "Find" field
Put a Space in the "Replace With" field
Then hit Replace All

Save Document

Find and Replace in Excel - More Info if needed.