I’m trying to do EXACTLY what is shown in this video:
Yet, when I create my new Rollup field, and select the field that links to the other table, it won’t let me do anything more and instead I get a message in the formatting tab that says, “Your field is not fully configured. You need to have a valid field configuration in the formula tab before adding formatting options.” But there is no formula tab visible to fill in. Why is it showing me this message?