Database is blank after upload

When uploading a CSV it’s important the application that exports it is set up to produce a CSV that is in the right format. A good way to go is to make sure your exporting application (usually a spreadsheet application) is set up for:

delimiter: comma
enclosure: double quote
encoding: UTF-8

then, when you import, set the plugin to the same settings

if you are uncertain if your CSV is getting exported in the right format, try exporting only a few records, then inspect the file using a plain text editor.

Also, make sure you understand how the matching record settings work.