[Steven Zahm]

@ Celina

I did a test import, you file, unmodified, and it imported fine. The only issue that I see is all the rows where the last name is blank, those will be skipped because an individual requires a first and last name. You could add an Organization column and move the last name to the Organization column so they are imported.

When importing, did you briefly see 95% before completing?

Are you navigator to this folder using FTP?
../wp-content/uploads/csv_files

Are the files you are importing located there?

Can you view the actual database? If so, what is the contents of the {wpdb_prefix}_connections table?