Error when importing excel data into my sql work bench

Error Code: 1300. Invalid utf8 character string: ''

Database Mysql workbench

i am importing excel data into my sql work bench.

LOAD DATA local INFILE 'C:/Users/1900057/Desktop/Sql Query/sndata.xlsx'
INTO TABLE sample.clinicalsamples FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' IGNORE 1 ROWS


when i import shows error as follows

Error Code: 1300. Invalid utf8 character string: ''