- Make sure you are using the csv template: https://experienceleague.adobe.com/docs/target/assets/EntityFileUploadTemplate.csv?lang=en- Make sure you are also keeping the first 7 rows in your feed (I usually open this in excel)- Make sure if you use excel, keep saving the file to .csv and not .xls- ...

Is this issue resolved?, I have the exact same issue, the website cookie message is displayed everytime I make changes in Target. Thanks for your comments.