Please follow the steps:

1. Access Attendee List, choose Import, and choose to download Sample Template CSV

2. Fill in the necessary information, required information would be First Name, Last Name, Email, then Upload by Choose File, or drag the file into the box. Name the Static List as you want: 

If the file is correct, upload will be successful:

3. To access the newly imported Static List, click on List: All Attendees 

All attendees belong to that Static List will show up: