If I add a the date to two cells F9 (28/05/2024) and E9 (30/05/2024) and format them as date format, and then in another cell G9 I write the formula =DAYS(F9,E9), it just outputs #VALUE! instead of outputting how many days between those dates.
If I enter a formula =F9+7 in cell H9 to populate that cell with the date a week after the date entered in F9, it also outputs #VALUE! in cell H9.