Unable to create a "ListAppend" Server Action.

In the Actions and Code Reusability exercise that is part of creating a movie database, I am unable implement what should be the simple step of creating a "ListAppend" Server Action. see attached image

I have tried everyhting I can think of but I cannot even find ListAppend in any options anywhere in the Select Action dialog. 




Go to Manage Dependencies and check if (System) includes ListAppend.


Your nailed it!

Thanks so much! 

Thanks for this!