Can't move deformer

Hello, I’m asking for help because I have problems with any deformer,

I can create it nevertheless I can’t move it even if I’m in transform mode I simply can’t select the bone. Usually in tutorials, when the mouse is over the bones/deformer the cursor changes to let you know you can move or rotate it, but it’s like it’s blocked or something.

I’ve seen tutorials and asked friends for help and no one seems know whats going on.

Thank you!!