Hi. I am trying to filter data from one sheet to another and the formula kept on having this error: NAME!

I want to have a separate sheet where all of the accepted data is in just one sheet. This is the formula I've been using but kept on getting an error:

=IFERROR(UNIQUE(FILTER('Site Reviews'!A1:X6000, 'Site Reviews'!C1:C6000="'Accepted")))