In the Import Wizard, using the Export Error Rows function, the export file is comma separated, quote delimited, like this -
"Conversion Date","Created On","Status","Status Reason"
But in the data rows, the quote delimiters are dropped and it's ONLY comma separated -
,,No,Yes,Yes,Disqualified,148,5,4,Anthem,
I don't remember this being an issue in older versions of D365 CE/CRM. This makes the file unusable if your data contains commas.