Diagnosis
You have chosen a function that requires at least one argument but cansupport more than one argument. This can be specified by choosing linesin the relevant list.
When the function was called, no element in the list was selected andas a result, no function arguments could be chosen.
If the list only contains one line, it is used for specifying theargument for the function in question.

Procedure
Select at least one element in the list and call the function onceagain.