Can't add a main camera to the node I need in Script Graph

Hello, I recently started learning visual scripting and script graph in particular, but from the very beginning I ran into a problem that I didn’t add either a game object or a camera to any Node and I don’t know why.

In this particular situation, I need to add a Main Camera object to the Camera Screen Point To Ray node, but I can’t.

Screenshot below to make it clearer what I mean:

Thank you very much in advance for the answer, this problem is very much preventing me from implementing my first project

image
Try this