What is the source of the list? Are you typing in a list or referencing a
group of cells on the sheet that has the list in them?

If you are referencing cells they need to be on the same sheet with the cell
you are setting up.

If you are typing in a list, like
hello,goodbye,good morning,good afternoon
then perhaps if you will tell us what the list contains, we can find
something that Excel doesn't like and is causing the error.

"Calle" wrote:

I think it is data- validation -list in the english version