The package MULTIPLEINPUTFORM OF DATA SHAPES tells me that there is an invalid input

I’m working on a formwork script, and I want to use the data shape package, but it tells me that the input is invalid.

I’m working on a formwork script, and I want to use the data shape package, but it tells me that the input is invalid.

Change Key with an uppercase K to key with a lowercase k.

Classes are not allowed as input names, and classes should always be Uppercase