It looks like you haven't got Microsoft365 which means an array calculation within OR()
needs to be CSE-confirmerd (Control+Shift+Enter). For Microsoft365 users this is done by default and your formula would actually work. You could now either use CSE-entering, or circumvent that using other methods to inspect a range of cells. For example using MAX()
:
=IF(OR(MAX(B2:D2)>10,E2>20),"Special Order","No")