Why can't I use the Magic Wand tool?

[#1]

This new version of Illustrator isn't allowing me to use the magic wand tool for some reason.

Eample: I want to select all the objects in my file that are blue and delete them. The tool won't even allow me to select anything. What's going on?

[#2]

This new version of Illustrator isn't allowing me to use the magic wand tool for some reason.

Eample: I want to select all the objects in my file that are blue and delete them. The tool won't even allow me to select anything. What's going on?

[#3]

It would be useful if you could us a screenshot of the artboard with layers.

And tell us exactly what you are doing and what is happening step by step.