In this past months I've been experienced several errors when I tried to download a CSV file to Assets. Sometimes it works with a comma, sometimes with a semicolon.
Did I missed something? May you please help me, I already read the documentation and I tried to save again the archive with another delimiter and also didn't work.
https://support.atlassian.com/jira-cloud-administration/docs/import-data-from-a-csv-file/