When a field is mandatory for a record - which is occasionally true for the name field -, you have to include this field in the field list, even if you do not want to select it for importing. This can also happen for a mandatory field of a related object. For specific help please provide the necessary information.

How many rows in the file you imported? Odoo only show first 10 rows of the file, there should be empty cells in the rest rows. Another case, you may not apply/or apply wrong column mapping to the model. Check this tutorial in https://www.odoo.com/documentation/14.0/applications/general/base_import/import_faq.html