You might want to try rebuilding the Data Warehouse request, because when I tested it, the dates were properly escaped with quotation marks ("):
"Date","Visits"
"November 10, 2021",193651
"November 11, 2021",203375
"November 12, 2021",196598
"November 13, 2021",185707
"November 14, 2021",183288
"November 15, 2021",182520
"November 16, 2021",184130
Your CSV file looks incorrect because the second column where the Unique Visitors number is contained has quotation marks when it doesn't need them.